I recommend having a look at Vanguard ball heads. They don't have a lot of history, but they're very good for the money. Arca-Swiss, fairly light, with good locks, and predictable drag. In accordance with my tendency toward overkill, I use an
SBH-250 head rated (optimistically) for 44lb. Pretty solid combo when paired with my (aluminum) Three-Legged Thing Jack tripod.
Note that whatever material you go for, larger leg diameters are more important than material, more sections cause some loss in stability, and the center section will
significantly reduce stability. I would not trade my aluminum, 3-section Jack for my sister's 5-section carbon Manfrotto travel 'pod, plus I removed, and don't use, the center section.
You'd think tripods would be simple, but like anything, technique is important. Where possible, ditch the center section, extend the thickest leg sections first, and weight/stake the legs for maximum benefit. With Big White Primes and other hefty lenses, Really Right Stuff and Gitzo gear starts to make sense.