Another vote for Kamp . Actually one of my more favourite hotels in Europe - good gym, reasonable spa, well appointed rooms and a great bathroom. I have heard Glo is good, but I have never been. Klaus K gets rated highly but I think its more form over function and if you get the wrong room you hear the bar/club all night. Of the four you showed, I would go for Strand. Otherwise the rest of the hotels in Helsinki are all kind of the same usual 3-4* fair in relatively central locations.

But that Haven place looks very interesting! I never knew about it and the first SLH hotel in Finland. Is it new?