I have an acrylic tank which I have been using for over a year now. Since I used to be moved every 6 months, the acrylic was great. I also like the smooth look and corners that acrylic has to offer (even though harder to clean). For some reason I find myself trusting the welding of acrylic over the silicone of glass, I worry about leaks less since there seems to be less space available for a leak. I'm sure that I have no scientific back up to this, it's just something I think about. I love the clarity and lightness of it as well.
Once I realised that I had to be careful, I had no problems with scratching. I am however very careful when cleaning the tank up to the sand bed. I have yet to have had any algae problems building in finer scratches.
Honestly, if I knew that the place where I was living was going to be for long term I would go with glass, starfire, and drilled by the manufacturer for warranty reasons. In the meantime, I have a glass qt tank and an acrylic main, I love the acrylic, but more caution needs to be had.
Good luck!
Rob
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