Philstar

Hi all, I find myself in a surprisingly similar situation to the OP of this thread. I bought my daughter who is now almost 7 a very cheap 70mm refractor telescope to see if it would spark an interest in astronomy for her, which it did. In doing so it reignited my own interest in it and now I am looking at buying a better telescope to use. I was considering the Celestron Astromaster 130EQ until I read reviews on here, then changed to the Skywatcher Explorer 130M, then after further reading changed to the 130P. I very much like the idea of a goto mount which again made me change my mind and look at the Skywatcher Explorer 130P Synscan AZ GOTO but now have found the 130PS AZ GTi which seems to be the better more modern GOTO but the scope primary mirror is not collimatable. Can anyone please advise me, is it worth going for the better mount and not be able to adjust the primary mirror? I assume the fact that it is not adjustable means it cannot move so all collimation is done with the secondary mirror? Also I have never used a red dot finder, how do they compare to the finderscope? Thanks Phil