Buy the Caldwell Rock. It is a very good rest for the day in day out guy. It has some of the BR features, without the big BR prices. I wanted to buy one of the expensive BR ones, but just did not use it enough to justify that big price. I had an orange Hoppe's rest, and it worked OK, but I just wanted a little more.
Personally I do not like the Lead Sled. Yes it works OK with small recoiling rifles. But IMO your point of impact will change with heavier recoiling rifles because it does not allow the rifle to recoil naturally. Thus changing the follow through of the recoil and shot. And some people put too much weight on the rest trying to take away the recoil, and that puts too much pressure on the stocks, and they can crack.
If you want to buy a cheaper one I have my old Hoppe's I will sell. It is in the picture below. I will have to have my friend find it first, but I will show you the picture. If you are interested, I will get it out. I will also ship the front sand bag with the orange Hope's rest. Tom.