indy, i remember we once had a quick discussion about how much you liked that amp. maybe its not 'flavour of the month' at the moment, but if you sell it then 100% sure you'll regret it some day. in five years time when you want one back, jcm800s will be rarer, and more expensive.
for uni i'd say get something more budget than the orange or the boutique amps discussed. maybe an analogue modeller like the SansAmp GT2 or Award JD10 - use them as really nice distortion pedals after uni, or jack them into a hifi or shitety solid state practise amp now for practise.
get the boutique plexi when you have a phat job after uni