Well there is other boards in the market that compete against DFI and have done so in a very competitive way. Asus for one makes awesome mobos for overclocking and no one in this entire Forum can deny that.

I am a happy DFI/ASUS person and i have never had any major issues in overclocking any of my present or past builds with either of these two manufacurers.

Which is better?

This will be determined by what your overclocking and what bioes they are using. You will note that both compnaies in recent years are using a very similar Bios Layout and this is why they both can overclock very well. This is in the terms of the P35 and X38 mobos. In the past year or so Asus and DFI top dog mobo's have not been superceeded by any other company.

I am still stuck on which manufcaturer to go with and what chipset to buy.

My plan is to run this setup next:

Intel QX9450
G.Skill PC2-8000 2x2gb = 4GB Dual Channel Kit

As for mobo not sure yet, either the P35 from DFI or the X38 from DFI or the Maximus Formula X38 from Asus.

It is a very tough decision as all those mobos seem to be doing very well at overclocking, well the DFI X38 is still not mature enough to really consider right this minute, but my plan is in Feb-Mar when the lower GHZ Yorkfields start to appear.