I will not tell you what to buy as what I like most has been discontinued and there will be no replacement - ever.
I will tell you not to try to use anything web-dependent. Maybe (note maybe), if you never stray far from the interstates, you can get by. I won't try again. We tried one well published one as a replacement. I though that 3 & 4G coverage would be good enough that it would not matter.
Well, three different times in three different states we ended up having to go back to doing Lat/Long on the road atlas that we still carry. (And it is a good thing we did have it.)
Even if you print maps based on web-based data, they are only good as long as you can stay on the printed route for the entire excursion. In our case, that just can't happen, we are too adventurous for that.
If you try to go with web-based at all, carry a printer (we do) and plan on 2~3 hours each evening planing and plotting for the next day. And you have to do this every evening and sometimes at the mid-day break.
Matt
Matt & Mary Colie
A sailor, his bride and their black dogs (one dear dog is waiting for us at the bridge) going to see some dry places that have Geocaches in a coach made the year we married.