Ummm... Yes, that was the one. But I think there is another one with GPS as well. I am not sure about the price, but there wouldn't be any issue with the match.
41K GPS would be best, if there isn't much difference in the color of the panel. I won't vote for Rockmars however there are people who are using it and are satisfied. The one that I have is also good but then, you have to see whether you are satisfied with this level of sound quality. But it is definitely better than Rockmars. I didn't go for the GPS one as I had it separately. But if you have to buy the GPS separately, then I would suggest you to go for built in GPS system as there wouldn't be much price difference.