I've never seen you tank but I hate it too.
I used to be a big acrylic fan back in my FW only days. I had several. Once I started reefin I changed my mind. Great for a FW setup but not reef with corraline, sand, rocks, coral... One of these days that tank may make a great sump though. I got one of those scratch removal kits and after working for an hour on one scratch (it never really quite worked) I gave-up. It did make an improvement but not like new.
I agree with cbashaw, go for the 90, 24" tall is plenty tall. Of course, make sure it's RR.
I'll give you $50 for that old sump ;-)