I'd find any pair of medium-weight all-leather hiking/backpacking boots that is comfortable on your feet and not too stiff in the sole. Waterproof them well several times with NikWax or something similar (the rub-on wax kind, not the spray on stuff), and then get a pair of OR (Outdoor Research) Crocodile Gaiters. Make sure you get a good size that fits tight around your boot and put them on as directed, looping underneath the boot after yout attach the velco down your shin.
I was a backcountry ranger in Alaska for years and I promise you can't beat this combo. You can cross streams and everything (as long as you step quick and have fitted the gaiters to your boots well). Plus you can ditch the gaiters quickly when the hiking isn't wet and muddy, and clean them easily.
You get adaptability, good ankle support, and this will be way less "clunky" than a lot of options. Look for italian or american made boots, without gore-tex if you can find them. I like Garmont boots, but there are several other good brands as well.
Another nice thing to include in this system is thin poly-pro "sock liners" under your normal Smartwool-type socks. These will help wick moisture and prevent blisters, and if your feet do get wet you honestly won't even notice.
Check it.