Small 4 Speaker System for Ceiling Corners?

This is for a 9.5" x 12" dedicated computer room and will be used for a wide variety of music with a Rock/Pop/Jazz/Blues mainstay. Not interested in heavy bass/loudness...would like a "Magnepan-ish" sound as much as possible but I don't have the room to spare for their wall mounted offering's 30"+ height. I'll be driving the system with some sort of 4 or 5 channel amplification....I like the time delay effect/modes. Want to stay under $1000 if possible. Any suggestions?

The 1979-ish Infinity Infinitesimals immediately came to my mind but all I ever seem to see on the 2nd hand market are the lesser rated Infinitesimals. of a later vintage