Dave
I have a 12" Lightbridge (collapsible Dob).
I mainly use:
- 9mm Televue Nagler for smaller deep-sky and planetary viewing;
- 13mm Televue Nagler for more general deep-sky;
- 32mm Televue Plossl for large deep-sky objects;
- 2x Televue Barlow on the Naglers for fine detail of planets and moon.
I find the TV stuff vastly superior to my various freebies and low-cost eyepieces (GSO / Meade), and well worth the money. The slight exception is the Plossl, which though superior to the freebies, lacks the contrast that the Naglers have - I will upgrade this to another Nagler one day. That said, the Plossl cost a hell of a lot less than the corresponding Nagler, and is still a worthwhile improvement on the freebies.
Hope this helps.