cheap audio interface in to record vocals and bass guitar+setting up a home studio

[Chaojon]

setting up a home recording studio + interface.

I have NO idea what to choose, I think I'll go with the
Roland TRI-CAPTURE
ART USB Dual Tube Pre
Alesis iO4 4-Channel 24-Bit
or the
Alesis i02 Express

but I REALLY have no idea, I sing death metal, which means I am going to growl and scream, so if thats a factor I just wanted to get that out of the way

about the studio -
I have the AKG D5 microphone and the Audio Technica AD700 headphones.
do I need more than an audio interface? how important is a mixer? a keyboard? I will be using a keyboard in my music but I can program it using CUBASE, because I am really low on budget.
about studio monitors, if they are THAT important I will be able to use my brothers studio monitors
currently I think I need, in order to complete the home recording studio, an interface, microphone stand and a pop filter, do you think I need anything else? and what interface do you recommend?
my budget is around 150$ not counting the mic stand and the pop filter, maybe if a mixer is extremely important I will be able to get another 50 or maximum a 100$ bucks for it (but that would mean I would lose an anthrax show. its the first time they come to my country so this is only a last resort)
and about cables, I have a regular guitar cable (PL to PL I think) and I have a female XLR to a PL.
which cables do I need in order to record using my interface or mixer if needed?

Thanks

P.S
how important is an isolator, an isolation pad? and is the AKG D5 good for recordings?

 

[mjbphotos]

read the sticky threads at the top of the Newbies section of these forums. You don't need a mixer. If you are only recording 1 input (microphone) at a time, you only need an interface with 1 channel input/1 preamp, so you can find a few selections in your price range - you might want to shop around for a used AI.