What to do with $200?

I bought a used Sky View 8" reflector from a guy last December, and have been slowing learning how to use it. For $400, it came with an EQ5 equatorial mount with dual drive and set of basic Plossl lenses from 43mm to 6mm. It has a Crayford focuser. I know a got a gonga deal. I can see cloud bands on Jupiter and rings around Saturn, a great start.

I'd like to get more out of it now. I have about $200 to spend (give or take). Any opinions? Dual-speed focuser, Tele-Vue lens, nice Barlow 2x or 3x? Where is the biggest bang for buck at this point?
Thanks for all opinions!

Mike