Best EPs for a 5" SCT?

[Tugboat]

My new Celestron Omni 127 came with a 25mm EP, which seems to be reasonable quality. I do have other EPs, but they are cheapo ones that came in a set.

I've seen 6, 9 and 12mm Omni EPs on sale on ebay for about £20 each. Does that represent a good value/performance ratio, or are there better options out there for a similar budget?

Thanks again

[Tugboat]

After reading some of the excellent info on this site I've decided to go for a 6mm TMB Planetary II from ebay. In particular the following were very useful, to name but two threads:

http://stargazerslounge.com/primers-tutorials/63184-primer-understanding-choosing-eyepieces.html

http://stargazerslounge.com/equipment-reviews/99295-andrews-eyepiece-mini-reviews.html

Although more expensive than the Omni EPs (which through searching I found weren't highly rated) the general consensus is that the TMBs provide very good performance considering the low price.

Cheers

Steve