Mobos – Which are hot, which are not?

This is a multi-part question, so please bear with me. We are a small computer builder/reseller, and I am re-evaluating which lines of mainboards we carry and implement.

I would like to hear from you which mainboards have worked well for you, and which ones I should avoid for these processors. The boards should be IDE, and use PC133 or lesser RAM.

Processors are as follows: K6-2, Athlon, Duron, Pentium II (Slot 1) Pentium III (Socket), and Pentium IV.

Thanks!