I was at the same crossroad a few weeks ago and almost purchased the SCALA Q2 BT to work with my NUVI 550 for both GPS & Music as well as communicating with my riding buddies but then when another friend wanted to ride with us and wasn't SCALA I realized I could have a potential problem as I ride with 3-4 differnt groups of riders. 1 group to work, another for quick rides localy and SCALA as well as other BT comms communicate with like models and don't cross to each other as I read it. Check the systems out for details and compatability. For me it was btwn SCALA and Sena http://www.cruisercustomizing.com/se...SENA-SMH10D-01
So, that said, I looked at the majority of folks I ride with and most had CB's so I went with the JM2003 for me and the wife to have intercom, CB for bike to bike and I am pulling the GPS into it via it's 1/8th aux in jack. So in addition to bike to bike, I have GPS calls, GPS fed music and in an emergancy with my phone synced via BT to the NUVI I can recieve a call if family has a crisis and I am on a ride. Will see where that takes me, installing over Turkey day. Hope this helps...
2011 White Vision - Nuvi 550, Lowers, Lloydz 2nd filter, Vic perf filter, CB/Icom, 96 Brake LED's, Clear Signal lens/Switchbacks, VIC Hwy Pegs, Stebel Horn, 7Jurock 15" Shield, PCV, Lloyd ATS and Variable intake, Ness honkers
2004 V92 TC - S1 flash, level 1 slip-on, Ness big sucker K&N, ISO Grips, 4x1.5 Highway Hawg Risers, extra chrome (never too much), JM 2k CB 4' antena, Mustang seat, HD Front TS & Lowers, OD Pulley
Retired Navy SCPO