Hi Damon, and thanks for writing.
The shorter your time-frame, the more freedom you have regarding mortgage choices. A 3/1 or 5/1 mortgage can save you money if you pay it off before it converts from its fixed-rate period to its adjustable phase. However, even then, you have some protections in the form of caps that prevent the lender from raising your rate and payment beyond a specified threshold.
Get some quotes right now from competing lenders for these programs and see how much savings you caould realize during the next two years. I recommend that you choose a loan with fewer upfront costs over one with a lower rate but higher costs, considering the fact that you probably won't have the loan for that long.