Massiver :
By the way my macbook pro has a TN panel also...
For my own elucidation, which Macbook do you have that has a TN panel? I'm not aware that they do come with TN panels.
I don't think I can really recommend a monitor in the $130 range. Not if you care about image quality, etc. I'll have a look around, but don't hold your breath. Sorry.
Edit: Sorry, something just came to mind. Many people think colors "pop" on reflective (non matte) monitors. Might this be the issue with your monitor? You get matte (or non-reflective monitors) by application of the non-glare covering and that might dull some monitors. I remember buying a laptop some time back with a "bright" screen, and indeed, it was impressive, albeit tiresome. I prefer matte monitors.
If that might be the case, at least that gives you a clue on what to search for in your replacement monitor.