In Rainbows. He's the most balanced from their all.
The first one. I'm not really a fan of anything beyond OK Computer. It just isn't my style.
you should try listening to "in rainbows". it's a lot different than the stuff they've put out on their previous three albums. it's a little more like "ok computer" and might just be their best effort yet.
Fell free to post your recommendations in the relevant sticky.