I've got a Sinclair...it took me a long time before I coughed up the money to get it...it's expensive, but it's one thing I use EVERY time I go to the range, so I finally justified the expense.
The whole shebang, including the windage adjustable top, was around $330. It's truly a precision piece, adjustments are smooth as silk, and the rest itself is heavy enough to stay put no matter what.
Ransom, Wichita, Hart, and Sinclair are found at a lot of bench rest matches, and would be considered moderately priced, compared to the likes of Farley.
The tops are generally interchangeable from manufacturer to manufacturer...the sinclair top I have will work on Hart and Witchata rests for example.
These rests are designed to be used with the rear bag of your choice. This setup gives you much more flexibility that a one piece rest that you set the rifle down into.
If you get into the high dollar stocks, like McMillan, they're designed to be used in the Sinclair type rests.
Even though I shuddered when I ordered this puppy because of the cost, I'm very happy I did...it does make a big difference in trips to the range.
check it out here: [url]http://www.sinclairintl.com/cgi-bin/category.cgi?category=RIBBRICO&item=04-2725&type=store[/url]