I don't plan on every buying a non breathable wader ever again. with the proper fleece underneath they are warmer that neoprenes and in the summer wearing shorts it's like wet wadeing.
The only breathables i have heard bad things about are the Hodgeman waders. I have had 2 pairs of them. Both pairs had problems with the seam tape coming undone and one pair the feet wore through (my fault). The simms guide is the best on the market. If you cant afford them at $360 the simms lightweight and the dan balieys are both good. I think the hodgemans would be ok if you were to aquaseal the seams before using them. Mine were actually more comfortable than my simms.