Bit of a hard call wanting three eyepieces to do it all without spending a bomb...In my f8 150 achro I use 9 14 and 20mm 100º ES eyepieces. Adding a 2X barlow gets 7 and 4.5mm and is a good spread but at a cost.
What to do...What is your budget and buy within it. ES 82º series are really good too as are the 68º series
Matt