[ophic]

Full system would be of no use unless you get the bike dyno'd and set up to suit. From what you describe, just wanting better looks and noise, I'd go for a slip-on. Budget ones cost about £100-£150 and they are a doddle to fit if you can follow instructions and wield a hacksaw. Yes you do have to cut the old exhaust off.

Go for one with a removable baffle so you can pop the baffle back in for MOTs.

The Scorpion Street Extreme stubby seems pretty popular, although not exactly budget.