The CTR-1000 is 39"X19"X20" which seems to me pretty plant friendly and leaves a little scope for having a fore- mid- and back-ground. 30g tanks that AGA offer only have 12-13" of front to bank which leaves very little room, in my opinion. The standard 55g US AGA tank is also a bit constricted. I also like the round front corners of the ViaAqua tanks.
Everyone to his/her own tank style.... but it is nice to have some choice - all too easy to be lumped with AGA or Oceanic Systems (an AGA subsidiary).