If you simply want a new truck then the Tacoma is nice but due for a redesign in a year or two.
However, your WRX will get around better than a Tacoma in all but the deepest snow. If it's a matter of not wanting to get the WRX beat up on the winter roads then I wouldn't buy a brand new $35k truck for that role. The current Tacoma has been around for a while, why not get a used one for half the price. Then you won't feel guilty about actually using it like a truck should be used, getting some scrapes and dents on it in the process.