Leinard.
A diagonal but get one that uses a prism not a mirror ($100)
Get a AC adapter for your camera IMO a must for mulitiple lenghty exposures. ($50-100)
Also a Autoguider camera I got an Orion Autoguider (as new) for $250 or I believe you can rig a Toucam to do the same thing and these can be purchased for around $150 from Telescope and Astronomy.
A switchable power board with at least 4 plugs no make that six, for the 2 laptops, camera, mount, dew heaters, spare who knows what else you'll need to plug in and a long extension cable.
2" and 3" extension tubes ($29 each new from Bintel)
An adjustable eyepiece projection adapter ($70 from My Astro Shop).
Guidescope rings can be made for about $50 if you have the skill.
Some good cases to keep everything neat and tidy $20 from Jaycar.
These are just a few of my favourite things, a collection thats still growing.
PS: if you need anything PM me I've got EP's that I don't use anymore that I can sell cheap like a 4" and 6" mm Plossl. I need to get soime money to placate my addiction.
