Well, motion blur is an effect that is added to the game; refresh rate doesn't change that. What is does change is how smooth something can look since it allows you to see a higher frame rate.
That's a good example of the effect of frame rates. Contrary to what you might think, 60 to 144FPS isn't as big of a jump as 30 to 60, mainly because of diminishing returns. But it's still noticeable in fast paced games and is great for stuff like shooters since 120+Hz monitors not only appear smoother but tend to have ridiculously low input lag.
That Dell monitor, being an IPS, will have better viewing angles and better color reproduction than the other monitors. It actually have a really low input lag too, so it's still a good choice for gaming.
Basically, the first few monitors you listed are normal sedans, the dell monitor is a luxury sedan and the 144Hz monitor is a sedan geared for racing but without some of the comfort of the luxury sedan.
Go forth; touch the Demon inside me. http://i.imgur.com/l7bHT.jpg