I prefer acrylic on this. I have been in the hobby for some time and recently after selling my 75 glass reef and taking a 6 month lay off, I decided to buy a 40 gallon sea clear acrylic. I love it. The clarity is fantastic, they last "forever" (don't have to wory about seals), they are so light weight for the sake of moving and I like the lack of a frame.
I know you pay twice the price, but they are a life long tank.
Oh yeah, I set up a tropheus tank with a small colony of 8 in a tang set up and couldn't be happier with my little biotope.