Hey
As a student I took the plunge when I wanted to move from a crappy HP laptop to something worthwhile - portable, long lasting, powerful - good for DVD, music, office programs!!!!
The mac I have found has been great - and have now just bought my third one - my last one would have lasted but I simply wanted to upgrade.
They are very good, and of course now you can install windows and windows based problems - useful for some uni programs etc.... saying that I have recently purchased iwork 09 - much better than office and fully compatible.
I would also say check out eBay as well as the student discount - which gives you free three year warranty...... and of course you can buy applecare - tech support for £50.
They also hold their value fantastically well......
My last MBP I had for two years - and sold for £250 less than i bought it ( I had upgraded the HDD and Ram)
Hope that helps, sorry for waffle, writing this whilst watching red dwarf