G'day mate and I am HAPPY to hear u r going to embark on 1 of the BEST rides EVER!!
Be sure to touch base with Joe LaChance (and his wife Diane) up in Madawaska, ME. REALLY nice people. Joe = (203) 436-7451. Tell him u would like to eat some Ployes and I guarantee u will see a big smile come up on his face. They are known for those up there.
I really LIKE the GARMIN a LOT. I use it daily and it is very versatile. If I am not mistaken, GARMIN is really the leader in the GPS field.
I wish I could personally compare the 2 but I definitely hear a LOT more abt Garmin than TomTom.
Also the GARMIN support is fantastic!!
I have the Garmin 550 Zumo. <-- IMPORTANT (at least to me) the Garmin Zumo 550 LOCKS onto your bike handlebar. The later versions I understand do NOT.
If it does not lock on, it is a quick release and u pop it in your pocket. Very easily. I prefer to leave it on the bike all day and take it off only at night when traveling. <-- personal preference.
It has XM radio, you can download GPX routes, u have HOME, FAVORITES, lots of other stuff but u probably know all that. On the fly (dangerous) but u can program as u ride. (Again dangerous.)
On another matter if I may..... if u go to the Iron Butt Association and look up their (AOW) Archieve Of Wisdom) http://www.ironbutt.com/tech/aow.cfm <-- There, I suspect u will find it helpful for long distant riding.
Feel free to ask away here. The information u get from these SCMA guys is VERY VALUABLE and is EXCELLENT in every way!!!! You likely know there is a HUGE amount of LDR (Long Distant Riding) experience here at SCMA.
Ride Safe my friend.............