Look at the sinclair or the hart Robert W. Hart and Son Inc. at Robert W. Hart and Son Inc.
Depends on exactly what you want it for also.
for example Sinclair has a new very light (aluminum) rest (04-3110) for Fclass with an all purpose top for $147
The standard sinclair and hart are steel and much heavier.
You can change tops to to different size bags and on the larger hart and sinclairs, you can even go up to the large heavy guns.
I would not consider the Wichita.
You can find used ones on Ebay and in the classifieds on BRcentral.