On the sights , what does leaves a lot to be desired mean?
If I were to say that ..... it would mean they are not adjustable. Or that they fall out when you shoot.
Luckily there are many aftermarket sights for the 75 that will do whatever it is you need it to.
as far as the trigger goes I own more then one CZ and the triggers from the factory are not awesome by any stretch, but will get better with use I promise.
If you are looking for awesome I sent my gun to Stuart, he did my trigger and it is Awesome. I mean AWESOME! I am also on the wait list to send another gun to CGW I have heard very good things about them. They also supply parts and instructions for those with time to be do it yourselfers. However, everyday plinking and shooting around the range after a few hundo down range the trigger is much less gritty, smooths out and performs well. If you want better then well, once again lucily there are options.
Enjoy you did pick a fine handgun!