I run the BFgoodrich g-force KDW's in the summer and the Dunlop winter sport M3's for winter, if you can do it, its best to run a summer high performance and a stickly winter tire and you will get the full benefit out of both...
Top mods for your buck
K&N drop in
shortshift (unless you like the stock trucker shifter)
upgraded clutch and flywheel, might as well wait since the OEM clutch doesn't last too long on the SVT (always exceptions to this rule)