Is your Burb 4x4 or RWD? That changes the answer dramatically, I believe. 4x4 options are apparently slim to none, at least I couldn't find much. Either way though, the only thing that might be classified as a reasonable price upgrade is brake pads/shoes with a higher friction coefficient. I guess it is relative to your budget.
Check out this info:
http://faculty.ccbcmd.edu/~smacadof/DOTPadCodes.htm
I had Wagner Thermoquiet Ceramic pads, which were labeled "EE". I swapped to some "FF" pads, and it seemed to help a little bit. Next time I need pads I'll probably get the Raybestos "EHT" pads (EHT52 for a stock caliper). These are apparently rated "GG". In addition, you could look at high performance pads from companies like Hawk, EBC, Wilwood, etc.