My opinion, if your building a reef, go with a glass tank with starfire front, if its a fish only or has a bit of live rock go with acrylic. Any big tanks(over 400 gallons) I would go with acrylic. Acrylic in a small reef is fine but does scratct much easier than glass, unless you get scratch resistent acrylic which will add about $500 to the tank price, scraping off coraline scratches acrylic easily, glass you can scrape with a razor blade and get way less scratching, the tank isnt big enough for the weight to make a huge difference, unless you insist on carrying the tank by yourself...lol. If your carefull when cleaning the acrylic tank it has its long term benifits, saves power by better insulating the water, and it wont shatter if something hits it hard...