For an office/den system I am using a McIntosh MC2105 Power amp and the matching MX113 Tuner/Preamp along with a MCD7000 CD player all in original McIntosh walnut cases. Other than the CD player this is a great vintage system from the late 60s/early 70s. They look just like they day they wre made. Very good sound, and with glass fronts and the blue meters, pretty darn cool looking. Plus these really hold their value. If space is a problem look at the MC2505 its the 50 WPC version and has the smaller chassis. If you really have room, go with all McIntosh separates for the Preamp C26/C28 and tuner.
Enjoy
Enjoy