Fully Certified Detailer!!
i i were you mate id try and get a set of B5 RS4 brakes if your on a budget, picked mine up for that from a mate and its the prob the best mod i have done for the price, you cant put a price on safety and tbh the S4 brakes are not the best. suspension wise billy's and eibach springs work but eibach dont make springs for our cars anymore mate as i was opting for that setup but went for eibach pro street coilys instead as they were cheaper and can be adjusted anytime you like. with them you should have nearly 1k to play with so get yourself an MRC remap or VIPER remap as these boys certainly know wot they are on about. with the change get yourself an exhaust be best from turbo back but we talking serious doh!! for that so cat back at first. if you can do that with the money then you should have a decent S4 and then you can save for more mods as its gona grip you by the cahooners and there no stopping lol
obviously rims is a good idea mind so look for a good set on the net or off the boys on here.
or like blue thunder said put the 2k towards an S4 that been K04'd which are ranging in prices 5-7k which is good deal as its gona cost you close to 5k to get it to k04. if i could go back id buy an S4 already done with k04's but atleast this car is all mine and all done by me(thats the joy of modding)