Hi, and welcome!

Of the interfaces you list, the Presonus is in a quality league above the other two, and it has MIDI ports in case you move up to needing those.

If you want to record the guitar amp through a microphone, get a Shure SM57 for this task. Don't try to use a cheap condenser mic. You could also use the SM57 with a pop shield for vocals, although if it looks as though your emphasis would be on recording directly from the guitar amp, then go for an SM58 for vocals rather than the SM57. Beware of fake SM57/58s floating around the market at temptingly low prices; the SM57 and SM58 should weigh 284g and 298g respectively, fakes are usually a little lighter.

Good luck, and let us know how you get on!

I'll probably experiment both with mic and direct input since I have the free resources over the next few years :cool:. Is the PreSonus going to be good for both of those? I also saw a review somewhere saying that it doesn't "like" line-level input. If anyone can tell me what that is, I'd appreciate that (I wiki'd it and got massively confused). Will I be able to plug my guitar into my MultiFX then plug that into the USB box?

Yes, both the Presonus Audiobox USB and the M-Audio FastTrack do not have proper line-level inputs. These are the high-level outputs of devices such as mixers, and you did not indicate that you would need that sort of thing.

Most guitar pedals still look like guitars to whatever you plug them into, so the Audiobox USB should be fine with an effects pedal. I cant decode exactly which pedal you have, as the name "MultiFX" matches half a dozen different ones, but if your amp likes the output of the pedal, it should be fine going into the instrument input of the Audiobox.

My pedal is a BOSS ME-50, and thanks for all your patience and help so far, I'm glad for it :smile:

Just something to think about for the future, the presonus audibox is usb 1.1 their better model the 22vsl is usb 2.0.
And just to add another name to the mix the Focusrite 2i2 is very respected interface and is usb 2.0 only £119.
[[url=http://[/URL]="http://www.gear4mus…"]Focusrite Scarlett 2i2 USB Audio Interface at Gear4Music.com[/]="http://www.gear4mus…"]Focusrite Scarlett 2i2 USB Audio Interface at Gear4Music.com[/]

Hmm, didn't see that it was 1.1. Thanks, again, for the suggestion. I'm looking at the focusrite now and it looks very nice indeed.
Which would be better for my all purpose needs then?
Recording guitar through a mic'ed up amp
Recording guitar straight into the USB interface
Recording bass straight into the USB interface
Recording guitar into the effects pedal then the USB interface
Recording vocals

I am no expert, I am at the same stage as you and have done exstensive reading on them, but focusrite preamps are top quality and their drivers are solid as well, whereas with the presnous peolpe do experince problems with it.
You do have to consider in the future if you will want to connect say a midi keyboard in which case you would need a seperate midi interface (they go as cheap as £14 for just the cable type).

As of right now, MIDI keyboards aren't a problem as I'm using a USB powered Korg Nanokey. But you're right, the Focusrite does look pretty awesome and the reviews are much better for it. I've got a while to order it anyway, getting it as a birthday present and I'm not until the end of march :p