I think in general that is a sensible solution as DDR3 is mainstream now and DDR2 is being forced out. That means that DDR3 prices will continue to fall whereas DDR2 prices will start to increase. As you quite rightly mention there is also the added performance benefit.
I don't generally promote any particular board because it is very much a personal decision, depending on budget, features you need, future upgrades you may have in mind, etc. If you like a particular board I am more than happy to give you my opinion of it.