HD Hybrid Digital radio. Satellite sirius and xm radio.

a. HD radio
Around the Boston area what are the lowest cost Hybrid Digital HD radios, that do the job in a manner of speaking, for listening to music and listening to singing?...

b. Satellite radio
What are the lowest cost tabletop or boombox type radios or setups available around the Boston area for both sirius and xm satellite radio services?...

Among a few references checked so far
http://en.wikipedia.org/wiki/Hd_radio
http://en.wikipedia.org/wiki/Sirius_Satellite_Radio
http://en.wikipedia.org/wiki/XM_Satellite_Radio