Many of the PDA's have integrated GPS. You could browse through this site or have a look
http://www.globalpositioningsystems....633e812ac20988
It's usually better to go for a PDA GPS Bundle, which usually works out cheaper.
e.g. my choice was a Mio168 with TTN5 Software and maps of Western Europe including GB. I really only needed GB and France at Street level so could have gone down the route of PDA with GB mapping and then purchased Street level France separately and saved a few £££'s but if I then decided to purchase say the Spainish map, the cost would then have exceeded the bundled price.