i would go with the cz 75. A lot of how "good" a handgun is is how well it fits you and how smooth you are able to be with the trigger. If you like the way the cz 75 fits your hand better than your glock then i would say that this already makes it a clear choice. Also to me the fact that it has a DA/SA trigger is a huge plus. In reality, there are some times when DA is ideal and some times when SA is ideal. The great thing is that with a DA/SA gun you can have both. I think of DA/SA guns like manual cars, you have better control of the gun and therefore can make it perform better for your given situation, all you have to remember to do is decock (or not depending on what you want). Also, looking at it from a gun enthusiasts stand point, if you already have a glock then why not expand your collection and get a completely different gun. In the OP you bring up the availability of accessories. Honestly there are many more accessories available for glock since its all standardized and everythings supposed to be "drop in" but the cz will also have some good options since its been around for a while and has been used by several police agencies around the world, so i would not base your decision on that factor. Also, you mention that you didnt really like the slide serrations, on this issue, i would say that unless you really hate them, you can get used to just about anything if you train enough with it. It could be that you are just really used to your glock and it feels different, but again is something that you really have to decide for yourself. In reality, as far as durability, reliability (some people will swear glocks are the most reliable guns to ever be produced but cz makes a good gun too), and accuracy and all the things that make guns good other than where preferences are concerned, the glock and cz are going to be neck and neck and will work great for all of your listed uses and really anything else that you could want to do with them. They are both quality made guns that will shoot decently out of the box. However, personally, due to the fact that the cz is an all metal gun with a DA/SA trigger that would be my choice.
Good Luck and let us know what you decide to go with.