My vote is on the Viewsonic considering it's a 1MS response time. No, 27" is not too big for gaming. Nothing is
. Resolution is a big factor. A 1900x1080 monitor is great for gaming and usually comes standard with quite a lot of monitors now a days. As for 16:10 vs 16:9, I have limited knowledge on that, but from the experience I had with it, it gives more vertical space, so less scrolling, but not much a difference over 16:9. From what I've been told 16:10 is soon to be dead as monitors are using 16:9 as a standard.