I have a 90 and do like it for the better eye level display dimensions, but one thing to keep in mind is the height vs. width ratio is much higher on a standard 90. If you aren't 6 ft. + tall, get ready for lots of sore armpits from working in a 90. It seems silly, but the extra few inches of height on a 90 make reaching the bottom for cleaning and aquascaping a little trickier. There have been many times I wish I would have gone with a 75.