Yeah, tough decision time.
I have the 300 gallon now but I also have fewer tanks due to the downsize. Going from a 2000 sq ft home down to half that makes it hard to have multiple tanks now. But happier in the long run. Less house to maintain for me and I can focus all energy on the 300g in the living room. Being in the hobby for some years now Ive got a lot of extra stuff to now sell off. I have new in box filters, heaters and things for smaller sized tanks that I will never have, lol. So been trying to sell those off to get some poly money.