Everyone's bay are so nice compared to mine! Mines all oily and stained but it works fine and that's the most important thing! If I keep it tidying the bay is on the list of things to do.
Balancing is normally when accelerating. Shaking when braking is normally a warped disc or if you are running grooved discs it's quite common for you to feel the grooves through the wheel.
Believe slipstreams are up there with the lightest wheels to be honest they are meant to be a very good lightweight track wheel! But yeah as Adam said look at the wiki on here tells you all the weights and stuff
I do love it mate just getting to that point I think that I've had it a while! Narrowed it down to two cars now I think , Possibly mate, saving for a house aswell though so I doubt ill be able to do it anytime within the new year haha