Pioneer without a doubt, the best you can afford for front 6-6.5" splits and 6X9's for rear-from experience soundstream offer awesome sound for fair $$$, 6.5" rubicon splits for front for $150, SST6.9 for parcle shelf-$150-nice 4ch amp to power them-jaycar 50W x 4 $150 or 100w x 4 $229.
I'v got a pair of sst6.9 in the rear of my vy wagon and had sst6.5 arachnid splits in the front of my old car-awesome speakers the 6x9's run off my 50w x 4 jaycar amp have some serious thump-I am using the amp to power my 10" sub and 6x9's-plenty of headroom and yet to run out of steam regardless of volume.