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The RRS 30mm ball head is light enough to match a series 1 gitzo and is strong with independent pan control.
The BH-30 and 40 are probably the better bet for protik perhaps though.
I am a fan of some of the less expensive heads and this is an excellent onehttp://www.bhphotovideo.com/c/product/822264-REG/Sirui_BSRK30_K_30x_Ball_Head.htmlI would never go cheap on a head again after being in Angor Wat with a garbage head made by Markins. Both knobs became stripped with one seizing up and the other allowing the head to spin around. I ended up using a beenie bag for stabalization ( This was back in 2008. Strangely enough my older brother's Markins did the same thing although he had his serviced and fixed, but then the same thing happend. I bought my little Really Right Stuff beauty in 2008 and have never looked back. I have heard good things about ARCA Swiss, but I am married to Really Right Stuff now and would never change. I feel their products, (heads in particular) are perfect. Even slightly cheaper than ARCA too and made right in the States!