I have owned both. I originally bought a Uniden 250-D with the card when they first came out. It worked, but I live in the outskirts of my digital area, so even after buying two or three different outdoor antennas, I couldn't pick the system up from my house too well. I decided to try a PRO-96 and it works/receives 10 times better. It also has the added feature of being able to program from your PC, which I like a LOT. The uniden supposedly had the same feature, but I could never get it to work.
I sold my Uniden on Ebay. Good riddance. I always heard they were superior, but I didn't find that to be the case. Maybe it was because it was the first one they came out with, but I feel like I wasted nearly $800!!! That's not including the multiple antennas, too.
Go Radio Shack. They're cheesy, but it's a good unit and it has the support behind it, too.
HAVE FUN!!