Ive got a transpac with a rec wing. Great for twin 100 steelies. As for the extra support i dont see where you will get that. ive only dived mine on singles twice and the second time was only because it was a double dive. I found it very uncomfortable. In single mode i had an Oxycheq 18lb wing on it which is great if you dont need much additional bouyancy. Its out of the way and does wrap around the tank like bigger wings will. This wing also goes on the inside when i rig for sidemounts and is almost perfect. Only the inflator location is a bit of a PIA.
Matt