Hi, I'm new to this site and I'm sure this question has already been asked, but here goes. I'm going to buy a new Stihl chainsaw ans I've narrowed it down to the ms250 and the ms290. I'll be cutting spruce, white birch and aspen up to about 16" diameter. I'll ony be cutting 4-5 cord of fire wood a year. Which of these 2 saws do you guys think would be the best option?