Bistiza, if you don't want to take St. Lawrence because you already coach them in another world, I would recommend taking Alma in Michigan. The MIAA is one of the Big Four conferences and full of intense competition.
New Jersey and CCIW are two other great options. They are up and coming conferences that are nearly full and are starting an inter-conference challenge next season. You could be a big part of helping them become elite conferences that challenge the big four.
Either way I highly recommend Wooden D3. As isack said, D1 can be pretty boring, especially compared to the intense rivalries and active community that D3 offers.