Oh doug s., don't get your tunas in a knot. I think it was JLM that spoke of "low fi" at home. Poor Emil just wanted some advice about making XM function at his workplace.
Many of us value having music as a part of our lives regardless of sonic imperfections. If I relied on listening to bad FM in the sweet spot, I'd never listen to over the air music.
I do think you are right regarding FM being superior in sound, but my "tuna" dial is clogged with c&w, hip-hop, and worn-out classic rock.
Even my NPR station is all talk. Click and Clack do sound like they're in my room though. 
henry, i have so many tunas, if i got 'em into a knot, i'd really be screwed!
going back thru this thread,i realize it's jlm who first said something about the waste of having hi-fi in the car & lo-fi at home. as an avid fm listener, (fortunately, i have a few stations here that satisfy much of my listening needs - quality signal
and content), i
do get a bit irked when anyone says that something like xm can compare favorably w/fm for audio quality in a nice home system. xm sounds like shite, imo, compared to
anything. and, quality fm really sounds amazingly good - if you haven't tried it, you don't know.
me, i refuse to support xm/sirius on principal - lo-rez formats should
not be encouraged/supported, imo. if you
must do xm, tho, insert a tube buffer stage between the receiver & your preamp; that will make it more tolerable as a background source. personally, if i needed background music at work/home, & didn't have decent fm to listen to, i would get either a computer audio server or a cd changer to load up...
ymmv,
doug s.