Been looking around for a new HU recently..currently shortlisted these few

Kenwood KDC-MP2032
Kenwood KDC-MP532U (with USB input i think)

Pioneer DEH-6800MP

Which is the best buy? Also, what are the prices on these things? i only managed to look them up on the net..havent been to the accessories shop to quote the price yet

my budget is around RM500-700