Philo
You should be good to go with that set up.. I've seen several of those used G17's at Dawson's and they are good to go. The Vanek kit would be the only thing you could skip for now to get rolling. You can drop in a connector, change some springs, and do an easy polish job and have a very shootable glock trigger. Also on the G17s you might want to add an extended mag release button but that's about it... The 17 is a great gun.