due ruote 

My 1" threaded HS is starting to feel like it needs replacing. The one on there now is a Deore XT. Couldn't find one of those on ebay but I did find a Deore DX and a STX. They are both NOS and the same price. Which one is better? Thanks.

Sixty Fiver

The DX is a very high quality headset that I would consider to be every bit as good as the XT... the quality of level of DX parts is pretty much on par with their XT counterparts.

Wisco 

+1 on the DX. For some reason there are still a lot of NOS STX headsets out there, I see them come through my shop on all sorts of bikes being used as replacements.

due ruote 

Thanks for the replies. I was about to pull the trigger on this DX, then I read the feedback. Yikes. Anyone ever deal with this seller (french-old-bike)?

Sixty Fiver

I rarely buy anything online... if you want a decent headset find an LBS that stocks a Tange Levin.

due ruote 

I was actually thinking about going that route. I've used them a few times and they seem like a great value. Also for some reason they seem like they're easier to adjust than most headsets I've had.