Wavytone,
Thanks for the extensive reply for me to digest - my mind has imploded.
I had been concentrating my research and reading on using DSLR (and hence a refractor scope that's generally recommended as the best choice for it) as that's basically what started the whole ball rolling. Therefore I didn't bother with the CCD camera side of things. Time to re-evaluate and understand the options you've shown.
I have zero problems with the concept of using a laptop to operate and collect as I fully expected to get to that position anyway. So that's not a problem for me concerning using a CCD camera.
I'll be exploring the internal autoguider versions in more detail - they sound ideal without needing extra kit.
Wrt reflectors: This whole setup will be mobile. About the only place it'll never really get setup is in my backyard (there's a streetlight right outside our place) except while I learn to assemble/use it - so it'll be packed and transported to more suitable locations for real use. Would this mean I'm likely to need to collimate the reflector more often? Is this a difficult or time-consuming process?
I note the comments on the mount. I'll ensure I get the scope at the same time. This should not be a problem.
Field flattener: yes. I remember reading about this and knew it would have to be on the list if I was getting a refractor.
SkyFi: I had already stumbled onto this while looking at the various interface options. I recently got a Nexus 7 as well, so I'm probably going to buy SkySafari to get with it - so this will be an option to integrate with the system.
Again, thanks for the reply. I'm off to read up on the CCDs and reflectors.