Amazing what happens these days to technology that is 6 years old. I thought my GO720 was pretty hot stuff back in 2007 (and it was!), but wow -- how things have changed since then.
One thing in particular -- the quality of Live traffic vs. RDS when added to the routing algorithm. My old 720 doesn't hold a candle to my 740 (or Via 1535) when it comes to traffic. Your Galaxy phone can use the TomTom App and take advantage of a Live traffic subscription -- one alternative to buying a stand-alone device to replace the 720. I like the screen layout and general visibility of the newer stand-alone units better, but if your eyesight is good enough, the Android app is certainly an option. Live doesn't eat up much data from a data plan, either.