I'd look at a used Peavey Tour 450 head. Used they're around £200. They are well made and sound great. But you still need a cab. Well, the good news is that there are lots available and in particular Peaveys are usually decent. I bought a used TX410 off another basschatter for £75 (he was local). I would say that for £300 you will be able to get a decent head (seriously, try that Tour 450) and a 4x10 cab, and it will be a rig that you won't feel you are really compromising. It will not be the loudest, but it will be more than loud enough... it will definitely not be the lightest or smallest, but it will work well and it will sound good.
excellent,thanks for the advice mate! just a couple of things, did you use a precision with this rig? ive heard that you really need to get a rig that matches your bass. also, will it be versatile enough for me,considering the range of styles i will be playing in?