ADDING SOME MORE PHOTOGRAPHY GEAR

It has been a year since I have added anything to my list of photography gears. I spent big time money last year when I went digital and bought my 350D, and subsequently a 17-40L and 100-400L. Now I am ready to add some more stuff again. I am hoping to spend some time this winter trying to shoot landscapes, and while at it, do as much as possible to improve the quality of the photographs. I have just acquired two plates of 2 stop GND filters(yes, I did not have them!!) and now it is time to look for a tripod.

I have decided on going for a ballhead, which would probably be useful in photographing birds. Manfrotto 322RC2 seems to be the obvious choice for the head. I haven't decided on the tripod leg yet, and am looking at my options. Not expensive ones - something that would cost around $200 to $250. My current equipment(100-400L on a 350D) would be less than 3kg, but I intend to buy a tripod that can support 5kg(if I ever set my hands on one of those huge prime barrels!). Any inputs or suggestions?