Great boat!
We recently purchased a 1984 O'Day 26-footer. We love it. It's not a real fast boat, but we aren't concerned with racing it. With the original jib, we've gotten her up to 6 knots. She sails very easily downwind, and is relatively stable in strong winds (15-25 mph) at all points of sail. The layout down below is well-designed and roomy. With about 5' 9" of headroom, it is surprising comfortable for it's size. The most headroom is above the galley, where you'd be probably be standing up the most. We have a Yanmar inboard diesel under the cockpit. Even with the engine, there is plenty of storage room down there. We've only had her since May, but have been very impressed with this boat. We plan on doing a lot of work on her this winter, mainly leading the lines aft and having the original mainsail reshaped and possibly installing a roller-reefer with a genoa. I hope this info has helped. Good luck.