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Thanks everyone.
Whilst I have an understanding of the physics involved with telescopes and eyepieces, that is no substitute for actually using them. Initially I looked a tprices and wrongly concluded that Plossl EP's were optically inferior to just about everything else.
My eyes are not that wel trainied, but I could differentiate between the cheap lenses that came on my first scope a Tasco 375 500mm 4.5" Newtonian and the same design Plossls of my son in law's Plossl EP's.
I'm presently looking at getting either a TV Plossl, Meade Super Plossl or Orion Stratus, but don't yet know what focal lengths to get.
I know not to get a 20mm and a 10mm since the 20mm will effectivelty be a 10mm when Barlowed. But if I were to get 2 or 3 lenses to complement my existing 25mm Plossl and Meade Super Plossl 12.4mm (seems an odd focal length), what focal length should I consider? I intitally thought 9mm, 15-20mm and 40mm (in 2").
from what you've all advised, I should go for a high magnification EP for viewing planets, and low magnification Wide Angle for DSO.
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