large tank - glass or acrylic

[synodontis]

I am considering purchasing a large tank, somewhere around 250 gal to 300 gallons (my frontosas and Moori dolphins are getting big) and would like some advice on glass vs acrylic tanks.  I know that acrylic will scratch more easily, but unlike glass, the scratches can be buffed out.  I like the light weight, strength and clarity qualities of acrylic.  Anyone have any experience with large tanks and have comments on acrylic?

[audioslave_36]

jimskoi here on Ovas had a 400g acrylic tank, contact him for pro and cons.