I'm planning on having my avionics tech install the LS 30 along with a GI
106A CDI as my number one NavCom. All of my buddies were suggesting the
KNX-155 but the Garmin looks like a much more functional and high tech
unit.
Does anyone have any comments on the LS 30 GI 106A combination?


If you're talking about the SL30, that's a great little radio. I'd pick it
over a KX-155 any day. If you're replacing antennas and coax also, get a
broadband antenna from Comant that handles both VOR/LOC and Glideslope.
Works great and will simplify the installation because there is only one
receiver input on the back for VOR/LOC/GS all together. The GI 106A works
fine too.