With all due respect, I've never heard anyone refer to CoPilot's maps as "current accurate maps." Their maps are usually referred to in the context of "I put up with them because it is a low cost app."
I would encourage the originally poster to review the user reviews on Android Market and the Apple App Store to get a good understanding of how the user community overall feels about CoPilot's maps.
What you should go with depends on what your purpose is. I wanted a good backup to Google Navigation for remote areas without a cell signal. If I am without a cell signal, chances are I am in an area that also isn't very populated with users and it is likely no one will have submitted map errors for correction.
For me, I went with Navigon as my backup because they use Navteq maps. It is much more expensive, but I have the quality of Navteq maps for my backup. I would also consider, now since it is out, Route 66. They use TomTom maps which are also pretty well regarded now compared to when TeleAtlas first come on the scene. I tried that app for a few days also, but didn't find a reason to buy the maps after the trial period though because I already had Navigon. Route 66 has a generous trial period. I'd recommend using it and seeing if it works for you.
The right solution for you is going to depend almost entirely on what your purpose of buying an app is. Unfortunately, with the 15 minute refund window, you will not get the maps downloaded in time to try it and refund it. Let us know more about your desires and we can help you more.
For the US, CoPilot is definitely the best choice -- their maps are updated monthly, and they respond quickly to user-submitted map errors. Plus, it's now half-price.
It doesn't require a data connection if you're not using any of the real-time features (traffic, fuel prices, etc.) and you have AGPS turned off. I haven't heard about the issues closing -- it's never happened to me.
I've used CoPilot for years on both WinMo and Android devices. I've tried all the others, but always end up going back to CoPilot; no one else can do the combination of ease of use and current accurate maps as well as they do.