I'm looking at buying a treadmill. Would use it most in the winter. I typically run 70 to 90 mpw, mostly 7 flat pace and under with faster workouts down to 5 flat pace. Looking for something durable with a strong motor. Don't need flat screen TV built in or any preset programs. Looking at precor 9.31 or similar or Nordic track elite series 9700 or similar. Any advice out there? Thanks!