... a couple things I forgot...

The real reason the geometry is different on a tri bike is because it's better suited to running afterwards. You're in more upright power position which allows you to use your hamstrings more. I've had the reversible seat posts, moved my seat every which way, and have gone through 3 or 4 stems of varying rise and length. Oddly enough, I've found the best position to be somwhere in the middle between traditonal road and tri, probably leaning slightly to the road geometry. I've found this to give me the best overall, best comprimise for regular riding and trathlons.