I'm using Bogen/Manfrotto systems with my GL cams every week with great success. Both have the older 3063 heads, one set of legs is the heavier 3046, the other is the 3021. I hear good reviews on the Bogen 501/503 heads. The Bogen stuff might be worth you looking into. I'd say to price it new, then look to buy it used.

Mark

Bogen/Manfrotto 3011 + 700 RC2 head kit at B&H is good
 

I got this tripod 3011 black + 700RC2 head kit at B&H a while back and, while I had a couple issues with loose screws in the head plate and in one of the leg's lower locks, after adjustment it's okay and pans and tilts very very smoothly.

Get the carrying strap too, it's worth it.

--Shayne

[Edit] P.S. you can stabilize light tripods by weighting them down.