Motul Chrono 300V is probably the very best you can get, its a 10w-40 Full Synthetic (but a unique full synth being that it's double ester).. expensive, works out to be about $140 for 6l (only comes in 4l and 2l bottles).
I use Motul 8100 X-Cess, it's a 5w-40 full synth and is about $75 for 5 litres, there is another Motul 8100 that is 10w-40 which is same price roughly.
Motul 4100 Turbolight alot of people here use, its a top quality 10-40w semi synth and its about $50 for 5 litres. Perfect for a street only car imo.
As for cheap alternatives for good full synths, have a look at performancelub.com the Mobil 1 and German Castrol in particular (the Redline on there is a very good full synth, and the Royal Purple XPR is a very good synth as well, the Amsoil another full synth that has a pretty good rep in the states)