I'm back after a 2 year vacation

[Dolf]

I seem to remember you from way back- but I have you beat… I was away for nearly 5 years. Anyhow, welcome back. As to the question I would probably look in the for sale area to decide. From what I have seen the prices are pretty close to what they were when I left the hobby. Perhaps a little more, but overall I think the internet has kept the competition pretty honest. From what I can tell the biggest difference in the width is for a larger fish to turn. I was considering a Volitan before, but decided that in a narrower aquarium it would not allow for any other fish to pass safely and I would suspect that there are species that almost need the space after the rock was added. Good luck with your new set up.