I have the Manfrotto (310 I think) Junior Geared Head.
It's great for accurate changing of levels or straightening the horizon.
It's downsize is it's bloody heavy and big.
I was caught by surprise when it arrived as I was expecting junior to be small.
Once you get over size and weight it's super.
It's steady as a rock.
I got of sick of ballheads and trying to get them properly level.
Maybe I should have gone for something more expensive like a Swiss Arca Ball Head or Really Right Stuff.
LOVE my manfrotto gear heads, they're almost all I use.
had some ball-heads, they blow. Kept one midsize manfrotto ball head for use with my compact cams.
ballheads are ok if you're messing around and need to be fast
The 410 Junior is a nice match to the 055 tripod, very solid, nice big mounting plate.
I use the bigger 405 with heavier rigs and bigger 'pods.
A cheaper head a buddy likes is the one with 3 large levers to move the 3 sections and each one is also a twist lock. it's quite precise too, not as small but if you're used to it it's pretty fast and solid. it also has built-in spring counter-balance which can be turned on-off and is occasionally useful.