1. AUDIO INTERFACE
As I said if you just want to put some drum and bass down (or if you just want to use generated instrument sounds rather than recording any of your instruments or singing/rapping) you don't need the audio interface. Go straight to (2) DAWs.
The PC Audio Interfaces I looked at were USB, Firewire and PCI-E card. PCI-E card I dismissed pretty quickly based on a number of factors including price, flexibility, market support and useability.
That leaves Firewire or USB. Firewire is faster but any option I looked at in Firewire came with poor reviews or were significantly more expensive. USB is more than fast enough for small scale recording and seems to have had far more development $$$ thrown at it for small scale recording.
So I narrowed it down to USB. I only wanted a max of two inputs at any one time. After MUCH reading and research I further narrowed it down to the following (e.g. you need 'Phantom Power' facility if you are going to plug in Condenser microphones - Condenser variety being used for vocals/some acoustic instruments and much less suitable for instrument amplifiers) :
NI Komplete Audio 6 (actually has 6 inputs, 2 x mike/quarter inch (front), midi, spdif, 2 x quarter inch (no level)
Presonus 22 VSL (Beware of the Presonus Audiobox USB and its bundles. It's cheap and looks the same as the 22vsl/44vsl but it is NOT USB 2.0 - 44vsk version has extra inputs and is also USB 2.0)
Roland UA-55 Quad-Capture
Line 6 Pod Studio UX2 - Comes with Pod Farm - guitar/amp modelling siftware
Focusrite Scarlet 2i2
They all come with varying DAWs (lite/starter/artist editions). Note that Presonus are the only manufacturer that market their own Audio Interface and a DAW - Studio One. This is a solid choice pairing. But the use of VSTs (plug in apps) is limited to the most expensive DAW upgrade with Studio One).
Side note : If you are going to record live drums you will want more than two inputs/microphones.
2. DIGITAL AUDIO WORKSHOP
Two things to say here. Firstly there are as many opinions on the options here as there are people with arseholes on this forum. Secondly, things have changed massively over the last couple of years. It used to be that there were only two or three options. But there have been a great number of options released and developed fairly recently that are as good as the old hands - in many peoples opinions better - and also much more user friendly. (As an example of how fast - Reaper, which was voted #1 app only a year ago recently came in at #7 in the same poll of the same people).
Some of the most popular and common from a small number of years ago have developed over many iterations - Cubase started on the Atari in the 80s! Like a legacy network they have had layers of functionality and applications added onto their base GUI. In a number of cases they are not the prettiest or user friendly. Two new players particularly have risen to amongst the top software (voted 1 and 3 from 15) in just the past couple of years. I'm talking about Studio One from Presonus and FL Studio (10) from Image Line (based on a very simple older drum s/w called Fruity).
As I spent more hours researching DAWs the same half dozen or so names got recommended over and over again on different forums, for both newbs and experienced folk.
1. Reaper - User friendly, good for instruments, practically free (download full version for trial and after a month you'll get popups suggesting you pay for ridiculously low price of $60 for a license.
2. Ableton Live - Good for loops and electronic music. Great for 'live'/DJ/jamming. Other things not so much. Mid priced.
3. Cubase - Been around since the Atari. Somewhat bloated. Possibly still the most used.
4. Cakewalk Sonar
5. Presonus Studio One (New kid on the block, but from a team with a lot of experience and history)
6. FL Studio 10 (Originally fruity - Grown/Evolved massively in last 18 months. The 'toy' app is now a top contender with a friendly UI and logical layout)
7. Pro Tools (Industry leader for a long time. Complex. Expensive.)
8. Garageband (OS X, cheap)
Note : If you or someone close to you is in education - learning or teaching - you can get significant discounts on some of these products.
I only include the names of these to give you a general idea of what to research. Opinions vary massively. None of the software is truly 'easy' to use, but some are far more complex than other. Some things to consider :
i) Pattern vrs linear DAWs
ii) Take it with a grain of salt and it would start arguments on recording forums but the following is interesting and generally informative :