I was going to buy the manfrotto 055xprob+498 ball head... but it would cost me around $200++. I thought, I usually only use my tripod for landscape work and the heaviest I would use it on now is with my 500D gripped + tamron 18-270 and maybe next time a full frame camera with 1 ultrawide lens..
how heavy could it be ? so I decided to look for an alternative and got myself an enduro A500ex + BH-01 ballhead or around $80 rated at 6kg.
I am guessing a 5D MKII or D700 + the brick or 70-200mm f/2.8 would be around 3kg max. right? so I have plenty to spare hehe so far haven't regretted my tripod purchase...