Well, you've got a lot of excellent advises here. And with more practice you'll be able to see much more DSOs. About eyepieces. Under light polluted skies for best contrast you shouldn't exceed an exit pupil of 3.5-4mm, better if it'll be closer to 3mm. So the best reasonably priced long focal length wide angle eyepieces for your scope (and mine too) should be ~18-22mm. For example, the 18mm ES82 or 20mm Maxvision. They'll give you an exit pupil of 3mm and 3.4mm and magnification of 67x and 60x, respectively. As for galaxies and nebulae, everything as others said, you need a reasonable bump in magnification for better contrast under LP skies. Many smaller galaxies require exit pupil ~1.5-2mm that converts in your Dob into 8-12mm focal length or 150x-100x. If I were you I would invest into a 12mm wide angle eyepiece that'll give you 100x magnification and 2mm exit pupil as you've been advised already. For example, something like the 11mm ES82 or 12mm Celestron X-Cel LX. Of course, no one eyepiece will substitute a trip to a dark sky spot, but...there are some things that you can do relatively easy to improve the contrast like 1) Adding at least a minimal hood or better full size tube-like hood , you can make it yourself from any sheet of a dark plastic or tourist mat. 2) Flocking the OTA using professional dark liner like Protostar or any other dark material. Not necessary disassembling the OTA, just read advise #5 here and flock most important area against the focuser . If you are interested read more on flocking: link 1 , link2 , link 3 . I used to observe in LP skies and the improvement in contrast after I've just added the hood (even without flocking) was noticeable, I started seeing fainter objects. To preserve dark adaptation people use Observer Vests and red goggles . If you have basic DIYer skills and some tools, you can fabricate light blocking screens like this or this. There are much more ways you can improve your scope and make your observing experience more exciting. I can recommend you to check out this Mega-mod thread for Zhumell dobs . And don't forget about a good Observing Chair like this or this. No one premium eyepiece can improve the resolution of your scope more than a good comfortable chair . Good luck.