Hi Anthony
Welcome to IIS and congrats on your first post
What is your budget? Conversion from Euro may be difficult for me
An LX90 8" is a good mix of aperture, goto and portability. These can be picked up from around $2k AUD second hand, or more new (obviously).
I've never looked through an ETX or Nexstar, but ETX owners generally seem very pleased with them. I wouldn't go for the small 70's, as a minimum I'd get the 125. The problem is the very long focal length (focal ratio f/15 I think) making the magnification typically always high, very difficult to get nice widefield contrasty views.