No matter what P35 board you buy today, it will be obsolete when the P45/ICH10 solution is released in three months.
Not really. When the P45 comes out, the performance of the P35 will not suddenly change.
Great boards will always be great boards as long as you have not exhausted your upgrade
path. I am running an e6400 cpu from the first core2 release. There are certainly many
more socket 775 processors on the market to keep my rig going for a while, such as a
quad core chip. Unless pci-e 2.0 is REALLY important to you, there is not much the P45
has to offer (granted also better crossfire, but for single GPU solutions this a moot point).
With prices on some of the X38 boards not much more expensive than upper tier of P35
boards, the same pci-e 2.0 and better crossfire support can be bought now. I feel its
boils down to this (as another user on the forum put it), if your rig is good enough to wait,
then you have nothing to lose by waiting. If you are currently bottlenecked and your rig is
not doing what you need it to do, then upgrade now. Some of the P35 boards are really
good values, and the price premium on the P45 IMO will not really be worth the difference.