I have a pair of Merrell Ventilators http://www.merrell.com/Product/NZGP/Mens-Active-Footwear/Multi-Sport/Mens/Moab-Ventilator-Mid.aspx
that I wore hiking the Scottish Highlands for nearly 2 weeks with good results. Well ventilated, not waterproof, very comfortable. Bought on sale at REI with my dividend check, so didn't cost and arm and leg.

For hunting, bad weather and hiking in rocky territory I have a pair of Browning Gore-Tex boots. After treatment with Nikwax they are warn, waterproof, fairly breathable, comfortable, with good ankle support. Bought on sale at Cabelas. yes, I'm cheap, but watching for deals let's me buy good stuff once and it lasts forever with care and is ultimatly cheaper than buying cheap stuuf several times.