@WalkingWicket37 completely agree about Dhoni, stood up he looks very fast because he has hard hands and is always directing his gloves towards the stumps. This looks rapid when he takes it cleanly but any thin edge of anything down leg and he is well short of the mark. Stood back he is lazy, very very lazy., Anyone can look good stood back (so long as your footwork is in order)
A name people constantly forget to mention is Kumar Sangakkara, he was both a quality glovesman and batsman. He kept to the mystery of Muriltharan and the swing of Vaas and the waywardness and pace of Malinga and made it all look fairly straight forward, wherever he was playing. I think I'm also right in saying he has the most ODI dismissals and a very impressive test record too.
In terms of trigger movement, there's nothing wrong with that at all. Often wicket keeping requires dynamic movement and you have to set yourself up for that however you find best. Nowadays you're in the minority of batsman if you don't have some sort of trigger, the same can be said for wicketkeeping. So long as you are set and well balanced in the power position at the point of delivery, it doesn't matter if you do the okey kokey to get you there.
In terms of up and coming keepers, keep your eye on Ben duckett from Northants. I played against him when he played for Northants 2's when he was 15(!) and was a quality keeper then. He must be 20 now and I have no doubt he will be next in line for the England job in a few years, so long as he keeps certain things in check..
Karlo