Thank you guys. I will look into eyepiece upgrades. I am actually really happy with the 10mm that came with it (saw Jupiter, and Galilean satellites the second time I took it out), but a 6mm definitely wouldn't hurt. Also thank you for the sight scope suggestions! I think I will go with this Telrad: http://www.amazon.com/Telrad-Finder-Sight/dp/B0000ALKAN/ref=pd_sim_sbs_p_2 Thanks again!
First, upgrade your finderscope. The EZ Finder it comes with is great if you're trying to line up with the moon or a planet - point the red dot at it and go. But that won't work very well once you start looking for fainter, harder-to-find objects that you can't locate with the naked eye.
Go get this for $90. Basically works as a pair of binoculars on your scope, allowing you to more easily find whatever you're looking for.
Second, get a Telrad. This gives you back the functionality of your EZ Finder. Looking through it doesn't give you any magnification, but it gives you the red-dot (actually a red ring) so you know exactly where your scope is pointed at. You'll need to find a place to mount it on your scope. I put mine next to my finder scope, like this:
http://i.imgur.com/1UcuRTY.jpg
When I'm observing, I use the Telrad to get my scope into the general area of the object I'm trying to find. Then I use the finderscope to drill down to an even more specific area. Then look in the eyepiece - if the object I wanted is not already in my field of view, it's usually very close by.
Those are probably the best two upgrades you can make in the short term. Longer term, you'll probably want eyepieces of various sizes and better quality...but that gets expensive quick. The 10/15/25 you have now are just fine.