Thanks for the advice guys. I'm a bit annoyed because when I first started scouting out a new monitor a few months ago there were quite a few 16:10 format monitors on the market that were affordable. I might leave it until after Christmas now and see if either Scan UK or Ebuyer have any deals in the new year. The HannsG looks pretty good, though. I'll definitely keep it in mind. Going for a 16:9 monitor would definitely be the easiest option though.
I'm in no rush. The HP monitor I bought about 6 years ago is still in perfect condition. The GF doesn't even understand why I want a new one. Part of me doesn't either but after seeing a friends big widescreen monitor running it kind of made a mark on me.