To the best of my knowledge, the Becker retro radios are not available with navigation maps for the United States. And they look modern. But they are very nice.
If it were my car I would
1) verify that they dash was not cut. If you look at the technical manual you find the size of the opening for the big-face (your car) and small-face (early cars) Beckers. If you have that size opening then your Becker options are good.
2) What is the speaker situation in your car, and is that going to change? This matters because the early radios are really designed for quite low wattage speakers so if you are planning on using something big, or if there is already big holes in the car for speakers, that's a consideration.
3) Based on the above, and assuming the dash isn't cut, I would install either a Becker mono or Becker stereo radio with one of the corded MP3 input cables. IF you are going to be driving larger speakers, then I would go with a Becker radio designed for a separate amp and use a more modern amp with an adapter cable that is available on eBay.
4) How you use a radio is really important. What do you want it to do? Will you actually be listening to it? if so, to what? FM or streaming MP3? Would you actually want to be able to play a cassette?
For _ME_ my favorite Becker radios are the ones that have separate amps and have preset buttons. So that means no Mexico because the Mexico doesn't have presets. The Grand Prix is a very nice radio, but if you aren't going to use the search function for tuning (because perhaps you don't listen to the radio and just want to stream) then it's a waste of money and added complexity. A Europa II stereo is a perfectly acceptable radio that is fairly simple and reliable. (no separate amp with the Europa II stereo). One gotcha on using a stereo Mexico - for reasons that are unclear to me I _think_ the aux input for a Mexico stereo is a mono input. I could be wrong about this but that's what I recall reading.
Scott