There are many motherboards available that are capable of working with both today’s Pentium 4 and Pentium D processors, as well as with the majority of the upcoming Core 2 models. However, please make sure you verify Core 2 support before purchasing a particular motherboard, as it may not coexist well with old motherboard revisions.
For the usual Tom’s in-depth article, head here. They are comparing all of the top i975x motherboards, including my favorite.. the ASUS P5WD2-E. No board really comes out a clear winner, because they all proved quite reliable, which is nice.