If you want to go cheap but good quality, I would say Acer. I throw those at my techs as second monitors and they love them. For me tho, Cinema (TB) Display is the best. I love my Thunderbolt since I can keep everything plugged into USB and the network. Only complaint is they forgot the headphone jack.
I use the HP ZR24w with my MacBook. Here's some features of the ZR24w:
sRGB (72% NTSC)
178º x 178º viewing angle
1920 x 1200 resolution
DVI and DisplayPort
matte (aka anti-glare) screen
I love this monitor. The only downside is that the scaler doesn't work properly if you plug in a DVD or Blu-ray player into it and want it to scale to 1920 x 1080. It will be in 1920 x 1200 mode, thus making the picture stretched vertically. This is only a problem if you want to connect something other than a computer (like a DVD or Blu-ray player, or video game console) to this monitor. If you're only using it with a computer, it will be fine.