what type of focuser should i get??

Hi, I have a 2yr old hardin 10" dob. The focuser is my main problem now and would like to get a new one(under 100 bucks). Is a helical style good or stick with an upgrade of the type I have? most of my problem is there is alot of play in the 1.25 adapter after i tighten the set screw( because of that i never know if it is collimated correctly). anyway any info would be appreciated.
thx
Brian

Keep an eye on the classifieds. Under $100 is not easy for a Crayford and that would be your better choice. Though there are a few rack and pinions that work well.
Most of the new focusers will be more like $150+. The Moonlite is $165 for instance.
Or William Optics $150 http://www.buytelescopes.com/product.asp?t=66&pid=4336&m= t ATWB

Hi Brian
I had one of the original gray tube Hardin DSH8" and found that an better 1.25"/2" adapter cured the problem. I purchased a compression model from Mercury System Support and it fit much better in the focuser than the stock one that came with the DSH8".
http://home.si.rr.com/mssproducts/
Hope this helps
Buck

Thank you very much for the responses, they have been very helpfull
Brian

Hal,
Yeah the other JMI is fine if all you have is $100, but better is better.

Here's a pretty good deal on a JMI DX3
http://www.astromart.com/classifieds/details.asp?classified_id=326476

http://www.astromart.com/classifieds/details.asp?classified_id=326480