It makes perfect sense to choose lower-end mainboards for the first benchmarks: these products will be very popular. Moreover, each mainboard is unique in its own way and differs from the regular Intel P67 Express and H67 Express based products, which makes them especially interesting.
Any major computer upgrade generally requires a full software reinstall too. No so if you heed the advice in the guide to Upgrading a Motherboard without Reinstalling. PCSTATS Tips