I will throw my opinion in on this.
We have Blizzak WS-60 on the Forester and the General's, studded, on the Sienna.
My observations: the General's are much better in slush/deep snow than the WS-60, and not too bad on ice with the studs. For the kind of driving I have been doing with the Forester, I am not sure I would get the Blizzak's again, especially for the cost (almost $1,200 for 4, installed, on winter rims).
Were the Blizzak really shine is ice, compact snow and cold temperatures, even without studs they have excellent grip. But are just not seeing those kinds of winters here the last 2 years.
So both my wife and I have been very happy with the General's and would not hesitate to recommend them or buy them again.
Edit: if you can't get the exact OEM size, consider getting a winter rim/tire package, you may be able to get a 16" set that will be less money in the long run and may have a better availability of sizes right now. Just need ot make sure the new rims fit around the brakes.