A Harris S-BRM 6"-9" and a good rear bag is what I suggest.
too tall for kids and alot of adults, and if you are shooting slightly down hill at 100, you will need a 3/4" spacer under the rear bag.
I think that they make a shorter model for tables.
Caldwell Rock and replaced the bean bag with a Protektor leather one, then a Protekter leather rear bag. Bean bags suck and this set up will last a coupla lifetimes.
Best option, I had to remove the wheel on mine because it was too tall.
If you can go on benchrest central or accurateshooter and put up a want to buy on a used Hart or Sinclair rest, you will be very happy with the purchase and pass it down to your kids.
