MsBeverlyHills - I go quite heavy on RDLs - right now I'm at 215 for 4x5s - I'll bump it another 5 or 10 lbs. my next workout. Since the range of movement is limited more than the range of movement in the SDL, you should be able to go heavier. I was only doing about 185 lbs. when I used to SDL.
Takeniteasy - I have to post this suggestion Danielle Edwards had in the March issue of Oxygen. She learned this at a fitness training camp - you do 500 - 700 lunges a day, six days a week, for eight to 10 weeks. It will give you a "really lean, tight package". Too bad you ruined your joints in the process. And died of boredom. I wish these fitness models would quit giving out advice.