Your last line hits it squarely on the nose, Baradium. Having ridden SEA-FAI on a Delta 737 and a Compass E-175 I've got to admit the -175 was more comfortable (both in Comfort + class).
It just goes to show RJs aren't really "regional" jets. Perhaps the Mainlines should consider acquiring some and staffing with Mainline pilots.
Oh well, one can dream!