I made the mistake of upgrading from a 20 tall to a 55, I kept the tank all of 2 months before upgrading again to a 75. The width of a 55 is just dumb, the 75 dimensions are so much smarter. Of course that is if you can make it work with your stand. I was fortunate to find a beefy media cabinet made of 100% wood to use as a stand for the 75. Alas I don't have any 75 gallons anymore, at on point I had 8 of them set up.
On another note, I am finding Aqueon tanks very had to find. I used to get them at Petco but now they a swapping to Imagitarium (or whatever their house brand is) with the tanks, lids, lights, substrate and filters. It bums me out because I want a choice between brand and house. For example Michael's (a craft store) swapped out their Wilton cake decorating section with their in house brand. I would rather have Wilton pans, food color, tips and baking accessories.