any external monitors as good as imac screen for text?

hi all.

this is my first mac. it's a new 21.5inch imac with a 2.7ghz i5 proc running OS X 10.7.3 and 12 Gigs of RAM (8 Gigs from crucial for $50, who can resist?)

i've got it hooked up to an external samsung syncmaster B2330 running in 1920x1080, which is this monitor's native resolution. works fine. it's hooked up via the dvi port on the screen via the mini-displayport to dvi adapter for the mac. i switch this monitor to the vga port when i want to use it as my pc monitor also running at 1920x1080. there is a source button on the monitor. very convenient.

the issue is that they text on this screen when coming from the mac is not as clear was when coming from the pc despite the fact that the vga port provides much less bandwidth than the dvi port the mac uses. i've read that the mac and the pc display text on screen using different methods. my pc uses an nvidia display graphics card. i believe mac use ati based hardware.

there appears to be much more interpolation when displaying text from the mac. perhaps this is a text size issue i'm not sure. either way i read a lot on this monitor and need it to be as good as possible for that purpose.

so the question is, does anyone have experience with an external monitor that is as good as the imac screen for text display. i can't use the thuderbolt display or a cinema display since they don't switch to different ports allowing my to use a single external monitor for two machines. i'm willing to spend up if there is a reason to do so. i'm on these computers a lot. i work from home with some regularity and my job is all about reading.

any help is appreciated.

best, c