Hi Mark,
I only just noticed your thread and I am late to the party.
I see you have NGC2264 (Cone Nebula) on your list. NGC2264 also applies to the adjacent Christmas Tree Cluster. You would be able to see the Xmas tree cluster very easily in your 10" scope, as it is Mag 3.9.
The Cone Nebula itself is a very different target and very much harder to see. It is really exceedingly difficult to see in any telescope under 16" aperture, and even then requires a skilled observer and very dark skies. I have spent a good bit of time on this target in 18" to 30" telescopes. By all means try for it under favourable conditions, but it's not easy in a medium aperture scope. The point of the cone starts at the tip of the Xmas tree and runs directly away from the Xmas tree with the same central axis.
If you are looking for targets to observe at different times you could download my 600 target observing list (excel spreadsheet) and then sort it by "best month to observe", or sort it by RA and this will group the targets so they are appropriately grouped for any given time of the year.
http://www.iceinspace.com.au/63-638-0-0-1-0.html
Cheers
John B