The lates offical Navcore version will do just fine.
There is only one issue with TMC reception and that is the mctx.dat in the root.
For most countries the last really working version was included in the 8.351 Navcore.
So if in doubt make two identical SD's for your US trip and replce the mctx.dat on one of them.
This way you only need to check which version gives you reception and after that use the other in your cam