I'm new to astronomy. I currently use my un-aided eyes and a pair of cheap binoculars. I've now decided to buy my first scope

, and I'd like to hear this forum's views on the right choice for me.
I've a budget of about $1,000 to $1,500. Small size is important for me because of portability and storage issues. I'd like an alround scope, but I like the idea of a scope that can also be used for terrestrial purposes. Most of my viewing will be in light-polluted Sydney, with occasional country trips.
I understand that buying any scope is a game of trading compromises, but because of my limited experience, it is difficult for me to assess which compromise to make for a first scope.
Based on my research to date, these are my thoughts on realistic options and their potential compromises:
1. 100mm to 120mm achromatic refractor. Chromatic aberration? Size?
2. 80mm apochromatic refractor. Aperture?
3. 127mm or 150mm maksutov-cassegrain. Narrow field of view? Cool-down time?
I've not included a big dob because of portability and storage issues.
What are the forum's views on what is the best scope for my requirements?