The firewire macki dealy looks great to me!
If you get adventurous with your mixing and etc on cubase, then you'll need a decent audio interface to be able to cope with it. You could get an M-Audio PCI card quite cheap used. If you get a Delta 44 you could DI your amp straight in, but you would need to buy pre-amps for when you want to record mics. These could be in a little cheap mixer though. The Delta 1010 has 2 mic inputs in XLR but is about twice the price (around £120).
If you fancy some nice outboard hardware though, one of those firewire/usb mixer/interface thingies will do the job.
I wouldn't get the peavey, the USB port is just a gimmick IMHO.