I don't know much about Columbia but have never been all that enamored about their appearance. With a C&C you're getting a very well built boat that will be seaworthy in all but the worst conditions on the Salish Sea. You will have no problem crossing the Strait of Georgia or Juan de Fuca. Assuming the hull is in good shape, with new sails you will have a boat that will last many years. The gelcoat is going to be thicker than a modern boat so it will buff-out nicely. I am assuming the boat is around 30 years old?
It likely has a perforated toe-rail. This is an extremely valuable feature on a boat. it's great for rigging a preventer or for lead blocks for a roller furling system.
One cool thing about old boats is the massive amount of used parts available such as roller furlers, self-tailers, hatches....E-bay is amazing.
If I were to downsize, this would be a boat I would look for.
Good Luck and have fun!
C&C 30 MkII