blchbld,
Welcome to BladeForums and the Busse forum in particular! Definitely check out the badmojo site. Unlabeled dimensions below in parentheses are the steel thicknesses.
For smaller Busses (4" blade length), I like the old style Lean Mean Street (3/16") / Mean Street (1/4") or the newer Leaner Meaner Street (.150") / Meaner Street (.220").
For small-medium size (4.5-5" blade length), I like the Badger Attack 3 (3/16") / Anorexic BA3 (.150"), or the yet to be released BA Tac. Another great choice is the Basic 5 (1/4"), but they are rarely seen for sale these days.
For medium size Busses (6" blade length), I like the old style Satin Jack (both 3/16" & 1/4"), or the current SJ Tac (3/16", or .220" for the LE version).
The thinner ones are lighter and will slice better, but I still really like the 1/4" thick MS. The 3/16" thick models are strong, and even the .150" models would be fine for all but the most extreme use (very heavy prying).
The handle on the old style SJ and BA3 is the same size, and I assume this is true for the SJ Tac and BA Tac. As X-Head mentioned, the handle is smaller on the older SJ than the current SJ Tac (and therefore the same applies to the BA3 and BA Tac). If you decide you want an older model, they appear for sale from time to time in the "For Sale: Production Knives (Individual)" forum, but sometimes they sell quickly, so check there often and be ready to buy if you see what you want (prices will vary, so it helps to know what is a fair price for the model(s) you might be looking for). Best wishes in your search, and let us know what you buy!
Gene