A fast mirror with a corrector would be the way to go making a shorter telescope without mucking around baffling light.
But if using a folded design a convex secondary (as Andrew mentioned) would bring the eyepiece down even lower and maybe reduce the baffling.
A "can" or round "shroud" around the secondary and tertiary mirrors might do the trick. I'll have to draw it up on the CAD to see.
By the way thanks to everyone that responded.
