I ordered DP55W from newegg and i5 and Ati Radeon 4870 about two months ago. It is pittance of cost but its raw performance is what I am looking for.
This is to replace HP Pavilion M9160F. It served me good and it is a time for a change.
Obviously there have been problems. It took awhile but it is definitely worth the trouble.
Chameleon and its support of ATI Rom file has been great. Boot image for 64 bit architecture has been essential. All those who compiled kernel extensions, many thanks to compile in 64 bit...
I almost abandoned this motherboard until I came across DSDT.aml specifically for this motherboard. The sound isn't working great. Some interrupt issues it seems as there seem to be mis timing of sound; lots of garbled.
With Apple's support of i5/i7 architecture, it is going to get better as 10.6.2 seems to prove.