From my limited experience:
(price is for bell & shipping for a 35 lb one, just for the sake of comparison)

- Ader - $86 for 35 lb – very nice quality, smooth, arrived in great shape
- Wright - $73 for 35 lb – not as smooth as Ader, arrived with significant paint chipped off
- CFF - $56 for 35 lb – haven’t tried this brand yet, want to for my next one due to price

ETA on 10/3/11:
- Wright - as recommended below, I contacted them, and they responded with fabulous customer service, resolving my issue above and beyond
- CFF - can't say the same, not a positive customer experience, can't recommend

my wright one arrived in excellent shape and is holding up fine, although it's not terribly smoth (which i prefer). i would call them about yours; they have excellent CS.

i received some of these as a gift and they're holding up great also; very smooth.

all of the cff ones at my gym are chipped to hell. if i was gonna buy some more i'd call wright.

I bought the Ironmaster adjustable kettlebell. I already had their dumbbell set so I thought they would make a good kettlebell. I like that I can change weights.

http://www.ironskullfitness.com/35-POUND-SKULLBELL-S35.htm

I'm not a kettlebell fan but shit, those are fucking cool!

I got my Ader kettlebells from Barry's Barbell. $57 for 35lb. model.




 

Update in original post

I bought a CAP 45 lb from Amazon for a pretty good price plus free shipping which is the killer usually. They're nice and smooth. Great quality with no problems so far.



http://www.amazon.com/CAP-Barbell-45––Pounds-Kettlebell/dp/B003J9M6I8/ref=sr_1_fkmr0_3?ie=UTF8&qid=1317682325&sr=8-3-fkmr0



They've got some even better prices on other weights. A 50 runs $63.54. The 35 is $47.54.