Yeah, it is a personal preference.
But, I would go glass.
Mainly because, yes, acrylic scratches then you have to repair it.
Sometimes sand will get in your magnet cleaners... you wipe and there's a nice scratch.
Soooo yeah lol my personal preference is glass.
Plus, you don't get scared trying to scrape off coraline algae from the glass.
Actually, just to be nice to my glass, I use acrylic safe kent scrapers.
Except for my mag-float.

Sort of off subject, has anyone seen that mag-flip and has anyone bought one?
They look pretty darn cool and I actually ordered one but hasn't come in yet. lol