Never used the 340....I have used the 301 in the past for work and it sucked azz.
de damn ting sennin man all kinda long long long way dat wasnt necessary
Hopefully the 340 is advanced by leaps and bounds and not a mild upgrade
My opinion, yuh cyah go wrong with Magellan Roadmate.....or of yuh plan to put it in-dash with bluetooth, pioneer is best
Then again, as everyone is aware by now...I really doh know what I does be talkin about at least 90% of de time....so take my chupidness with ah grain ah salt