My merrell yarra boots arrived today from javari (an amazon partner). They have 20% off their already cheap prices. I got them in stone (like a brown colour really) for £77. There's a promo code on homepage. They are so comfy, waterproof and look nice on. Think they are currently £140 on merrell site. They also had other styles Inc Oslo.
I got a 6 in the oslos, i'm normally a 6, occasionally a 7, more than enough room on leg for me but I have fairly slim legs. They sit lower than your calf though which is generally a slim area of legs!
Emo, my experience is if they are waterproof, they'd tell you!