I'm getting the Deep-V, 36 14/15 double butted spokes on an Ultegra hub from Harris Cyclery, should be here in a week. Little north of $200 but I won't have to worry about a rear wheel again and that's worth the surcharge
Now, at 250 lbs and dropping you could even go with Mavic Aksiums - I rode those (at 270#s) and are great, light, and cheap. Have to get another when a rag got stuck in the rd, ripped it off, tweaked the rim, popped some spokes and bent the dropout. Bad day.