Best Monitor to compliment 27" Cinema Display?

[Glaxx]

Hey all, I'm looking for some recommendations.

I have the 27" Cinema Display, and I'm looking for a monitor to use as a secondary display. I want to have it in portrait mode (sideways) and I'd like it to match the height of the Cinema Display and also match the vertical resolution (1440) if possible.

Suggestions?

 

[CWallace]

You might just consider another ACD, frankly, as the non-Apple 27" monitors with as a high-quality panel will be close in price. I'm also not a fan of mixing matte and glossy (had a matte Dell 22" with my 27" iMac and replaced it with a 27" Apple Thunderbolt Display).