I use an Induro BHD-3 with a heavy tripod. I plan to do some traveling soon and I'm looking for an arca swiss style ball head similar to the BHD-3. It must have a knob to adjust tension and use my arca swiss plates. I'd like to keep the cost at $100 - $150. I plan to use it with the Manfrotto 055XPROB. It'll be used to support my D700 and D800 and lenses ranging from my 20mm through 150 macro and 24-120. I don't need it for larger lenses, just something small that supports 5 - 10 pounds of gear. I'll add that I'm very satisfied with my Induro gear and I'm considering the Induro BHD-0 ball head but want to consider other heads.
I think the Markins Q3 is the best travel friendly ballhead on the market. It performs almost as well as its larger siblings, with the identical engineering and build quality. But it is a little above your target budget.