Agreed.... Although you can take the HDD out of a xbox360 and put into another and it just works, PS3 can't. You take the HDD out of a PS3, and that's sometimes a task as you need to unscrew it etc and plonk into another PS3 - well it formats it.. Ooops.. Content lost.
Swings and roundabouts. Each has a strength, I think the PS3 has the better options all around but the 360 makes it so easy to swap the HDD, no reason to reclaim a gamer tag if you don't mind un-plugging HDD and putting into another machine.. My missus old boy does this all the time when he comes over, he brings his HDD - instant gamer tag and all his content on my 360. Job done.
Anyhow, think OP got his answer. Ps3 is a good machine, plenty to help him make his choice..