I'd have to also recommend the P95F in a choice between those monitors.
Although if you were going with the CM721-F monitor (which would be truely apples to apples since the Viewsonic you listed was also perfect flat screen), I'd personally recommend the CM721-F over the Viewsonic cause I personally have that Hitachi monitor and have been very happy with its performance, clarity, warantee, and brightness. Thats just my personal and biased opinion. The only reason I ever switched monitors from my CM721-F was cause I got an incredible deal on a Cornerstone P1500 professional monitor (21"). BTW, I think when you get a high rez. capable monitor that does it at over 75hz, you'll realize that its nice to have alot of screenspace to work with. I'm running the P1500 in 2048x1536 @ 60hz (yea its a low hz rate I know) and am particularly fond of all the room.