I may be bias and I have never sailed a Tartan. However, I just purchased an 01 Beneteau 311 with lazy jack system and solid Keel. The thing is fast and stable. It virtually sails itself, with just the right amount of windward helm. I don't know who is telling you that the Tartan is a better boat. What is the PHRF on the Tartan? The Beneteau is 141 which makes it very competitive for its class. I really like the full toe rail and the aft rail seats on the 311. I would only buy a boat with a Yanmar diesel I don't trust the other brands. I added another battery under the sink to handle the nav equipment and refrigerator compressor more effectively. I would go with the Beneteau.