Your question is one that could classify as a personal decision. Historically, in most cases, a home closer to the beach will retain its value or increase faster than one that is further away. The personal decision is the differences in the houses, a new home will have settleing cracks and changes,but is brand new and beautiful when you walk in and smells of new wood, paint, sheetrock etc. An older home moves less over time, and from your description, may not be as pleasing when you enter. An older home may also have lead based paint, anything built prior to 1978 probably has lead based paint, unless it was remodeled, where new construction won't have lead based paint. Historically, taxes on an older home will be less than a new home, because the new construction taxes will be based on the current market value. Right now in Milford, taxes are based on the evaluation of 2005, when the market was about 30% higher than it is now. You might want to discuss the tax amount with the Tax assessors office before you buy. One final thought, you will probably pay top dollar for the new construction with less negotiation where the older home may have more negotiation room. You can also do renovations to make the property exactly to your tastes. Basically an older home you can start with a clean slate on the kitchen, bathrooms etc.
Your Realtor should be able to help you talk out these things, and help you get in touch with contractors that could help you with estimates, If you are not represented by a Realtor, as your Buyers Agent, you should be, it's usually free to the buyer, the sellers pay the agents commission. If I can help you any further please let me know. I hope this info has helped you and I wish you Good Luck, & Happy New Year!!