Patriot,
Good questions... Unfortunately, the parts have not arrived yet.
I went ahead and ordered the Blitzsafe antenna, based on info from the XMFan web site and forum:
http://www.xmfan.com
The Blitzsafe antenna does come with an adhesive pad to stick it on the roof if you are not happy with the magnetic mount.
The single connector antennas are part of what they are calling "second generation" XM equipment, so that may explain the better performance and lower price.
I'll know more after UPS visits me this week.
Klaus
"God made some men big and some men small, but Sam Colt made them all equal."