if it was up to me i'd get a 1.2k HU and a 800 comp set. another way to go is keep the stock HU, and get a RM800 amp and 1.2k comp set. save up for the HU and sub later on...
also keep an eye on good quality 2nd hand items in Ice for Sale, u may get your 2k money's worth, instead of buying new cheap stuff, its better to get older high quality eqpt.