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Slice, to answer the rest of your question: My good EPs are 9 & 25mm GSO & 15mm Televue Ploessl. I also have the 20mm Andrews Series 500, which is a bit of a dud, but still usable. It produces a streak of light eminating from bright objects, much like one of the four diffraction spikes due to the spider. The difference is that this spike is brighter and rotates with the EP. My 4mm Ser. 500 is useless. I have the GSO Superview 30mm as well. I can't barlow that one with the shorty, it's a 2". Not too impressed with the SV. The 3 good ploessls are really good though.
The scary thing is that I'm not sure that the televue ploessl is better for $145 than the GSOs for $39. Last I used the TV on the full Moon, it produced quite unpleasant yellow fringing at the limb. Neither of the GSOs do that. Scope wasn't collimated well though. I'm thinking of buying a GSO Ploessl of the same focal length as the TV for comparison.
All my EPs are used with a GSO 200mm plate-glass Dob.
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