I get no pixelation with Vue either, and with an internet feed thats right at half your speed, three and four streams at once doesnt give me the slightest issue as well.I went with PS Vue and have been very happy. No pixelation here. We have 60MBPS up and 3 streams going with no prob. Give it a shot with the free trial.
I wanted to like Sling but it would buffer all the time.