The three boats that you've mentioned aren't stellar light-air performers. We were in Penobscot Bay for about three weeks this summer, and can identify with the light air issue. A Pearson 30 or similar-sized but more modern C&C would provide you a much larger range (and enjoyable sails) in light air. A J/29 or J/30 would get you into the racing scene quickly, but might not have the daysailing cockpit space of other designs like the Tartan 10. (That design's great cockpit is offset by its accommodations below deck.) In Penobscot Bay there are likely some Sabre 34's, but that may be getting too big or expensive (and they might not be as quick as a J/30). Everything is a balance, so finding the right boat for you depends what you're willing to compromise on.