These are not 'either/or' projects. You are not forced to choose one or the other.

Personally, I recommend doing both to almost all modern rifles. I have floated and bedded enough sporter rifles to believe in the benefits, even just for hunting rifles. Then again, I do shoot in pretty extremely varied environments, and expect longer range performance than some might.

If you are only going to do one, then it should be free floating. I don't know why you wouldn't go ahead and glass bed (other than trying to save money) when you do the float job, but it makes far less sense to me to glass bed the action then not free float the barrel.

Now, if you have some reason to believe you need to full length glass bed your action and barrel, rather than free floating the barrel, then go ahead. I don't believe in that.