I've finally found the cash to upgrade my piece-of-junk $20 tripod. I've been looking around and there are so many different options... I have a Rebel XTi and I mainly use the 17-85mm lens but I'm also hoping to get a 70-200mm soon. I also use it with a Speedlite 580EX2 and battery grip. I'm looking to spend about $200-250 and I would prefer a ball head. Thanks..