I have the same configuration including the Zagg and a Smart Keyboard and have found it to work well.I don’t think it is at all heavy even with 1/2lbs leather Smart Cover and 1/3lbs Zagg Glass Cover on it, it is still great. The weight really is amazing considering the size of this iPad v the 10.5”
I too believe the bezels are too big but looking forward to the next version which will hopefully have more svelt bezels.