Hey mate
at the risk of sounding preachy, might it not be cheaper to just switch to cubase rather than buying a mac to stay on the logic apple cart? (when the time comes of course, it sounds like you wont have to worry for the TI)
i was a die hard logic 5.5 user for ages but the day came when i realised Its never going to progress, its a nice program but its already showing its age...ive had lots of problems with it that i simply never have anymore with cubase. (not being able to bounce a cpu maxed track because you cant record offline, rewire ports being swapped around and stuffing up your whole track when you instal a new rewire program, multi channel vsts such as battery not working properly all the time, missing sound files in old projects [cubase handles it so much smarter], having to go to a seperate audio program to do simple processing tasks, and so much more..)
they are the same programs with a slightly different interface when it comes down to it, it doesnt take that long to learn cubase and for all the smart extra features it comes with i can 100% endorse making the switch... im only using SX2 and already SX3 looks like it has some killer features up its sleeve.
i really miss emagics autofilter and tape delay though...
i still bounce things into logic from time to time to use these features
have a nice day
-Dan