Hi goridegords,
I'm assuming by your forum name you are based in Newcastle, UK?
Digital Village and other UK retailers offer Apogee Duet and Logic studio as a package. Looks like a pretty good deal!
Duet is very very nice. I've been through a few interfaces and the duet is my favourite 2 in/2 out portable interface.
99.9% of MIDI Controller keyboards (ones without their own onboard sounds - only used to control Software Instruments in Logic, Cubase, Pro Tools etc) are USB.
If you want to use your own MIDI Synth or MIDI hardware then you can get cheap and cheerful MIDI to USB interfaces. Work really well and simple to use.
Ouch. Just got an email from macprovideo with a promotion which is amazing. They are offering 25% off their monthly subscription for life! So, $18.75 per month instead of $25 a month.
Here's the link incase anyone reading this is interested.
http://www.macprovideo.com/plans/new/pro25
It's good until Midnight (PST) February 24th, 2010
deej