Good luck, I recently made the switch to longbows. I have been able to try out quite a few and have really enjoyed mohawk bows and holm made osprey. I shoot 31" as well, and I would recommend at least 66" in mohawks and a 64" holm made osprey/goshawk. I have been really impressed on how the osprey shoots, and would venture it isn't much slower than my recurves.
I love shooting the longbows, something about them.
There are so many awesome bows out there, and guys like Sixby make stable bows that really shoot a fast arrow...from what I hear!
Good luck!