I am cheap. I have a house with an tuck under garage and 2 9X7 flush-foam core doors w/tension springs. Lowes carries Dalton doors and the store by me has 2 left at 1/2 price. It is the 8000 model which is not insulated and has tension springs. I live in MN and my garage stays fairly warm from the house heat. I like the price ($115)but wonder about the heat loss? will the door be noisier than what i have now? 30 yr old doors. i think the openers make more racket than the doors. should i spend more and get torsion springs?