i wouldnt trust Tom's Hardware much.
I prefer other sites like anandtech.
It's the little things like not using the latest drivers for their reviews.
@ OP, your CPU would bottleneck at that res, but you could fix that with a bit of overclocking.
As for the HD 4850, it's an awesome card, hasn't failed me yet at 1920x1600. And don't let anyone tell you the stock cooler is crap, the fan is just set at a very low speed at stock, which is fine if you're not overclocking, you just need to turn it up slightly, it'll still be inaudible.