Hello Dave,
Plus one for M104. Myself and a few friends had a night out last night here in Perth where the viewing was just a little on the poor side but M104 was still quite viewable. It's common name is the sombrero galaxy.
As for the ethos while it is a nice eyepiece it is huge and it is easy to see why they nickname the large televues as hand grenades so you might just want to see one for real.
You're right about only having a couple of good eyepieces. I have a range of orthos 25, 18, 12.5, 9, and 6 to be precise and hardly use the 18 to tell you the truth. First place I would start at is replacing your 10mm as the ones with the scope are pretty poor. You will notice the difference.
Simmo
