I just ordered a Celestron X-Cel 12mm, from Agena today. Not really something, I needed, but rather a treat after a long hard week with a lot of overtime at work. This will give me a magnafication of 100x with Mars on my SkyQuest XT6, so that could be fun. It'll be fun to see how it compares to the BST 15mm. I've been wanting a nicer 12mm or 9mm. My current 9mm is a GSO Plossl, which is nice for my son's young eyes, but I can't see though the thing. I figure the 12 will have more all around uses for my taste than the 9mm in the long haul. Maybe as a star splitter/ planet gawker.