The larger your ATA, the more forgiving your bow will be. The larger your brace height, the more fogiving it will be as well ( Unless I have that one backwards...but I am sure about the ATA.) A lot of people like to get a little bit of a shorter bow for convienience. My bow is only 30.5 ATA. I would see how smoothe it shoots. Really I would go with what feels best to you.

I don't know about that length...but I think you can get pretty close. Like for instance, the bowtech 82nd airborne is 36.5 ATA. That allows it to get phenomenal(sp?) speed. But really you will just have to see what you like best by shooting around a bit. Also this will depend on your price range. A lot of the 'better' bows will cost you $650+ at least.