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Don't forget about Meprolight! Pound for pound the same quality as Trijicon if not slightly brighter. Some run a little cheaper than Trijicon if you look in the right places. I have both Trijicon and Mep's on my glocks and prefer the mep's overall because of their brightness and focused sight picture in the dark. The TruGlo are nice also, I have used them but I haven't installed any on my guns before. I think you will serve yourself well if you purchase any one of these three brands.
As far as installing them yourself... If you have access to a sight pusher tool for your glock, it will be a no brainer! They do make a few models that require no pusher to install them (most of these models are adjustable sights). They slip into place and you just tighten the allen screws to secure the sights in place. A little thread locker and you are good to go.
As far as the standard fixed sights, trying without a pusher is a little harder to do, and you do risk breaking the tritium vials in the sights. Most companies won't replace a sight that is broken during installation unless it is an authorized dealer with the proper tools.
I have a pusher now, but I used to install them with a non-marring punch and a small hammer. If you are careful you shouldn't do any damage, but one wrong slip could ruin your sights.That being said the choice is up to you and your confidence in your ability.
I prefer green sights as they last longer (in terms of brightness) over the years you will have them on your gun. Yellow is the next longest lasting. In most cases with tritium, the darker the color the shorter the lifespan of brightness.
Hope this helps you