I have had a pair of Maggie 1.7s for 2-1/3 years. I power them with a 30+ year-old Perreaux PMF1150 B in a room bigger than yours. Mine's about 16x20 with a 15' vaulted ceiling in an open architecture that opens onto the doorless main floor.
The Perreaux is rated at 100w into 8 ohms, and given its weight and size of power supply, I suspect it puts out 200w into 4 ohms. It is a great match. I can play them louder than I ever need.
I throw a wide range of music at these speakers. I'm not a metal head, but I *do* have a special love for large scale orchestral music (Scherazade, The Planets, Pictures at an Exhibition, Elgar's Enigma Variations, etc.) and big band (Basie, Buddy Rich, Stan Kenton, Harry James, etc.) and classic rock (Beatles, Stones, Cars, Police, Pink Floyd, Bob Seger ...) and they never disappoint. The .7 and .7i series aren't as restrictive on power and dynamic range as the previous versions. You do want an amp that's *very* comfortable driving 4 ohms.
I also augment the bottom with a pair of small subs that don't go real low (about 36Hz), but are easily fast enough to integrate with the Maggies.