I'm planning on buying a Surface pro 3 either i5 or i7 with 8gb of ram. I'm strongly considering getting the extended service plan. Is this a smart use of 150 dollars or should I get the i7 instead and just skip the service plan? I'm a sophomore civil (or mechanical I haven't decided yet lol) engineering major so I still have a semester worth of pre reqs to take before I'm in my major classes. Thank you for your time and consideration.