said by joecatch :Questions:
1. I have 4 computers on the network using CAT5. Would I get better PC to PC transfer rates with the GIGE over the GEN2 -Rev E?
1. Yes, but you can also do the same with a GigE switch connected to one of the Rev.E ports.
3b. Rev.E is only B/G.
Other folks with direct experience can answer the other parts of your questions.