Hey Bigchump you might be right that these old Irwin's are good for M-I-L and/or the Drill Sargent, both of whom know something about sailing.
Just last Thursday when the local (South Haven, MI) cruiser/race fleet was out for their weekly race I followed a couple of boats out. I was the last one getting out on the Lake and hoisting the sails. Following 4 boat on a close reach withing a half hour I passed all 4. These were boats from the early 1980's thru 1990 sailing in a 10 knts. wind, which windspeed is about the minimum my boat needs to have some kind of forward motion.
My 1973 Irwin 32 with 1989 main and 2002 150% genoa out ran this Westsail 32, C&C 32
, Hunter 31 and Catalina 310. The Westsail is a much heavier boat than mine but the other three should sail the same or better than mine and it was like they stood still
All 6 of us on board were comfortable and mother in law and DS would have enjoyed it too although they call me Capt. Bligh and the DS might have started a mutiny
With 13 sails on board you must be a much better sailor than the average cruiser. Maybe I should carry my 1973 sail too as they would be well "formed" by now and I'll have 3 sailbags and two sails up on the boat.
Bottom line look at a(the) boat you're buying with open eyes, weigh the positives and negatives for what you want to do and make an educated decision so you can enjoy sailing.