Wow so many choices! Thank you for all the replies, I didn't realise there were so many to choose from. Just makes life harder grrr. Yes I definitely need to be careful of the weight limit and make sure it is well under. G8 is borderline too large for me, but if I decide to go for guided then would be a good choice perhaps. I need to think more about if I just want a DSLR setup, or future proof for guided capability
David with the TakTee, what sort of weight/focal length/sub time have you been able to achieve?
Sean, any experience with the Unitec models? Astrobin has some great pics with them