Yoda (ALB) is correct. You live in DC Metro area - you'll want heat and air conditioning (sitting on I495/270 in traffic). Water-cooled is truly the way to go. Beck can build an exhaust that will give you the air-cooled exhaust sound (close to square exhaust ports of the 356 even) - without leaving a drippy oil trail. Plus I believe it will maintain its value and be more desirable in the future. No frequent oil changes or valve adjustments - no overheating.