I ran Blizzack WS50's on my FWD Altima but that was out of necessity. 1. I couldn't get out of an intersection if it had to, 2. on snow cover highways when you changed lanes the back end would hang up on the slush between lanes and surprise you with an uncontrollable spin. Did that on day 3 of owning it! The blizzacks made the car very drivable regardless of the conditions with the exception of ice but at that point everyone is screwed! If the X handles lane changes without the wibble wobble of the backend I think I'm fine running stocks, then again, it does pave the way for nicer summer rims...hmmmm
New Hampshire doesn't treat roads down the the pavement in most storms they just keep the excess off the roadway unlike Mass where they carpet bomb the roads with salt and calcium chloride and kill everything in site. RIP to my last two cars because of excessive corrosion!