75 or 90 gal?

[nordkapp]

I'm about to order a new RR tank to replace my 29 gal and I can't decide between a 75 and a 90 gal.
I understand the benefit of having 15 extra gal and vertical space however I also remember preferring 29 to 37 gal tank due to easier reaching the bottom.
Any input? Should I just flip the coin?

 

[flower]

I have had the 75g and now have a 90g. I love the bigger tank. I have to get on a step stool to reach the bottom, which I don't have to do very often..But I can reach it.
I also have a 30g tank and I admit it is easier to reach and mess with. There are critters that can go in the 90g that will never live in a 75g. My blue hippo tang for a good example. He is almost now too big for the 90g but he has been in there for over 3 years. He was in the 75g as a little guy for 1 year only.
Also the larger the tank, the easier to keep it going, small tanks can have things go wrong very fast.