Cody-The one in your link will work fine. However, it's limiting as the female SMA is not a standard antenna hook up. It is cheap enough to buy and use though.
I would recommend you get a decent Comet or Diamond antenna mount and wire the truck with coax that ends in a PL-239. That is a standard antenna mount and when you upgrade to a truck mounted mobile radio it will have the SO-238 that accepts the PL-239.
In the end you are going to want the power and clarity of a mounted mobile (as opposed to hand held) radio, so you may as well plan for that and only do the antenna work once. The UV5's only put out about 4 watts, which is OK but there are situations where you'll want 25 watts or more.
Your call though, and the more I think about it the antenna you show would be a good back up redundancy to have along on a big trip. If you wanted to use it to get you started it should work great, assuming things like the magnet are powerful enough not to get knocked off by trees or wind.
Ebay is another good source for stuff like batteries, chargers etc. You can buy the adapter cables there, like SMA female to SO-238 for pocket change. They will come straight to your door in 2 days from some sweat shop in China.
This does point out one of the many weaknesses of this radio, and that's the antenna mount.
The other major one is the charger.
While this is a great radio for the price, it is not a great radio, if you know what I mean.