I do need to make use of many windows applications this is the only reason I'm even considering the Sony but I have reservations on the native speed of windows applications on the mac book, anyone have any comments and experience there?
Honestly, I'd probably
go with the Sony if I were in your situation.
I
just sold a 11.1" Sony VAIO (to help pay for my 17" MBP!) so I have first hand knowledge of both.
The reason I'd go with the Sony is that your buddies probably have access, ahem, to the software you need.

With a Mac, you'll buy it all and it gets pricey.
Also, I'm sure that your college publishes everything in PC format because it is 90% of the market.
The VAIO is
BLOATED with BS software and utilities though. And Sony really is into
kludging so reformatting the HD with a clean XP and then adding all the Sony stuff is a
REAL PITA! 
Trust me. If you don't install their proprietary drivers in the right order or before certain XP updates, it will lock up and you have to start the
XP INSTALL all over again (unless you create an image of the disc with something like Acronis).
The Sony machine is very fragile. Go to a CompUSA and witness how many keys are missing from their display models.
That said, if you are gentle on machines and can deal with pre-installed AOL, Symantic this and that, Napster, Netscape, and whatever else they toss in, as a student the VAIO is a better fit.
Once the school has failed to turn your brain to mush and you still have some independent thought, then I'd by the Mac.
