Plasma has better black levels, uses more power than an LCD, are generally heavier than LCD's.
LCD's don't suffer from burn in, (in all fairness the plasma manufacturers claim that new plasmas' don't either.) LCDs' are usually cheaper when comparing like features. Glare doesn't wash the picture out as much on an LCD as it does on a plasma, so if you watch tv in a room with a lot of sunlight take that into account. Normal definition channels don't look real good on HD LCDs', and is supposed to look better on Plasmas'
As for the motion blurr on LCDs' the new 120Hz tvs' are supposed to eliminate that.
I went with a 47" LCD 1080P 60Hz tv. I have a room with large windows (glare), I don't really notice the motion blurr, (it's there, and sometimes I see it, it just doesn't bother me that much). The picture, on HD channels is fantastic, and I can live with the picture quality on the normal def channels.