Best case that's 18" or less tall?

[Jumpem]

The desk I want has about an 18.5" high opening for the tower. That means any of the larger Antec's are out? What's left?

 

[optimistic]

http://forums.anandtech.com/messageview.cfm?catid=37&threadid=1187948&FTVAR_MSGDBTABLE=

 

[TRUMPHENT]

My Lian Li PC-60USB is 17 5/8 inches to include the rubber feet. Be prepared to frequently clean the front filters. It is easy but you have to remember to do it and it. It would leave you just enough wiggle room.

 

[Zepper]

The Athenatech 747 and 503 series cases are all less than 18" tall and the Evercase 4252. There are lots of others too.
.bh.