Do we really need anything more than 8" woofer and 1" tweeter for medium size room?

Nonoise,

Just looked up your speakers, they sure are dense, solid works of art.  Love the forward tapering top.

Bill

Bill, 
You can't really tell from the photos but that taper is on all sides of the  front baffle and it's 2" thick. Rapping my knuckles on it results in basically, pain. 

All the best,
Nonoise

Depends on the music. For lots of commercial "Pop" music, the lowest note in a recording may well be the open E string of a standard 4-string Bass (electric or standup), which produces a 42Hz tone. For Classical organ works recorded in a Church, that's an entirely different matter; the lowest note produced by the far left foot pedal of the largest Pipe Organs is at 16Hz!

The Spendor SP1 is still one of the best speakers I know. Have a pair and rotate it with bigger and more expensive speakers. Will not play insanely loud or get down to 30hz. Use a REL if you want low bass. If I had to take one speaker with me it would be the one.

My speakers have two 6" TL drivers per side, and a ribbon, and I augment them with an EQ'd 15" sub in my 24' x 20' room--but that's a personal choice. I listen mostly to rock, pop, and old-school R&B and country, and my combination of speakers/sub delivers a decent amount of impact in my treated room. But I think the choice depends a lot on room size and listening preferences.