The ones that fit. Try not to cheat yourself. I wouldn't buy online without at the very least trying on a bunch of different pairs to find the best fitting brand/style. Then again, I'm very picky and will sometimes put boots from two different same size pairs together for the best fit. Shoe people shudder when they see me come in.
For me it's the Asolo's but for my friend, too uncomfortable. Vasques fit her perfectly. I prefer leather with few seams as possible and a tongue stitched all the way up. Waterproof is a must for me.
For my step-daughters, who use the boots rarely (though on occasion daily for up to 5 days at a stretch) and generally don't do over 5 miles (or much less, either) and are growing out of shoes like crazy, we got Redhead boots from Bass Pro. Cheap and they've had no complaints. Says they're waterproof, I'd say water resistant. Nylon/suede. They have about 200-300 miles on them and the boots/feet are holding up fine.
Again, if it doesn't fit it's not worth it.