I bought the northwaves, very impressed so far. Northwave Celsius GTX ‘Artic’, so the added bonus of the ‘artic’ version is a fleacy/wooly lining to them which makes them super toasty. Haven’t ridden them in torrential rain yet, but thats mainly because I dont like the rain in winter, as no ammount of clothign keeps it all off while remaiing breathable, so I always freeze. But they’ve eben fine on -2 nightrides, and never let a drop in despite walking through puddles.
They’re so good I actualy considdered swapping my Pitch to SPD’s as I dont think anyone makes a comparable flat shoe apart from bug walking boots! Usualy wear them with thick socks, but I’ve worn them with normal offcie socks and been fine, although the sizing meant I rattled round bit front to back as I’ve wide feet (hence discounting shimano automaticaly), thick socks help pad them out a little.
The laces are ace, easy to do them up wearing winter gloves. But you cant put much tension in them as theyre elastic, less of an issue than it first seems though, its not noticeable on the bike and I guess it prevents you from packing the insulation down too much or cutting off blood supply.
Tried a few on (lake, shimano, northwave) and just bought the ones that fit best on the basis tha tthye’ll all do a good job so the biggest difference would be fit.
The only downside (and I guess this applys to most high ankled winter boots) is they slightly restrict ankle movent while walking compared to summer SPD shoes, but it’s barely noticable on the bike.
£140 from my LBS.