I have a 62" with 18" riser and 2- 60" bows with 16" risers. (same length limbs on all three bows)
Brian is putting the finishing touches on another 62" for me now.
You may see some difference in smoothness of draw with a 58" but I doubt it. I sure can't tell any difference in the 60" and 62".
I agree with Ryan, Give Brian a shout and see what he suggests as far as riser and limb length.
My favorite is the 62" but it probably has more to do with aesthetics than any other factor. The 18" riser is more sleek in appearance in my opinion and I like wood and there's just more of it in the long riser.
You'll love it and soon you'll suffer from TTA like me and a few others that frequent this place.
Trap