Hi Norm, I, for one would not buy a 20 & 10 mm. A 32mm, with either 25/18, 15/12, would be a better spread. Reasons are, the barlow will double/halve each.
Buy the best quality barlow you can. Shorty + or Meade #140.
A combination sight tube or plain 'Cheshire' will suffice for collimation purposes. This will help also.>>>>
http://skyandtelescope.com/printable...rticle_790.asp
A red LED torch is a must.
If you're buying new, then the t'scope will come with a finder. Usually 8 x 50 or thereabouts. Stick with that for the time being. Good quality E/Pcs are more important.
HTH a bit more.
L.
ps. The Meade SP's have an apparent field of 52 degrees. The 32mm gives me 1.44 degs @ 36 x mag.