Right now I'm having a blast with Arista.edu/Fortepan/J&C Classic (all the same film) in 200 and 400 speeds with Rodinal 1:100 in 120, 4x5, and 8x10 sizes. I've also become a fan of TMax 400 (4x5) in D-76 1:1.
Depending on what size you're shooting, your choices should change. I doubt that I'd work with the Arista.edu/Fortepan/J&C Classic 400 in Rodinal if I was shooting 35mm, but my 35mm gear's not seeing much use these days. In larger sizes the grain from Rodinal doesn't bother me.