2 grand... hmmmm I'd say some nice DBA4000 slotted rotors for the front, new pads all round, a decent boost controller, Spitfire coils and some Idrium sparkplugs.
Boost it up to 10psi, the brakes will save you and the engine will thank you for the coils and plugs.
By the way... Why on earth would u wanna lean up the afr ????? You want it to run slightly rich to protect the engine !
As with the rims, I picked up a set of Konig Netz in 19s with good tyres for $1000 off Ebay, no gutter rash nothing....perfect, looks about 6 months old, considering these things are worth about $2500 - $3000 a set new and another $1000+ for tyres, I think Id scored a bargain... My point is, if you look hard enough and have the patience, there are bargains out there to be had.