I have been using Go910 since i bought it 6-8 years ago and absolutely love it. No newever TomTom device even comes close to it so i dont even bother of upgrading and Go910 still sells for $399 on amazon.
It has 64mb of RAM but has 20GB of internal storage(drive) - so you dont have to use 2GB maps and can use full maps as well as load all the maps available for the entire world and still have space for your MP3's and videos. As for remote i haven't used it in years(battery died and i dont care enough to replace it - i always sit next to it and can easily reach it). BTW i am currently using 9.026 navcore and havent had any problems with any of the maps once. I am sure there are newever navcores that would work, but my current one works flawlessly with Bluetooth, voice commands, the only thing it doesn't seem to work with is traffic antenna - did you get the traffic antenna to work on yours with any navcore?