is strava having a free trial currently? they did a while ago and i tested it out. it's not worth whatever they're charging. try it for a month yourself. all the good features are in the free version. the paid features are silly, in my opinion of course. everyone has different interests, so if someone is paying for strava i'm not ripping on their decision or anything.
garmin and strava integrate well. you don't have to chose. both my forerunner 220 running watch and edge 830 bike computer automatically load my runs and rides into strava. for free.