Thanks for the input and good opinions/advice as always. All appreciated.
Had a good think about it, and it seems that it all comes down to trade-offs when comparing the 100's and 120's.
APM 100's are smaller and more portable, and dont require such a substantial mount/tripod
APM 120's obviously have the benefit of the wider aperture, with slight trade off in size/weight and mounting requirements.
It seems past the APM100's you start getting into very beefy mount territory. I'm going to stick with the 100's as I feel they suit my needs a little better. The 100's are at the limit of what I would consider practical for transport.
The 120's aren't going to allow me to suddenly start resolving globular clusters and galaxies, so i'm now telescope hunting instead. That's another subject however for another thread!
Edited by RickyD85, 29 May 2018 - 05:22 AM.