Excellent advice, Murph!

Just two tidbits- It's probably obvious, but if you want to see up fans for both intake and output, look for a rack with sides. If you're NOT going to power-ventilate, get a rack without sides or with removable sides.

If you can't access the back through a door, you can put the rack on wheels by either building a platform with low-profile, heavy duty casters or by using a workshop tool mobile base. I've used both in two different situations with two different racks.

::::::: No disrespect to Axiom, but my favorite woofer is my yellow lab :::::::