I can't imagine that a 9-10K hr life limit is going to be of much concern for the 114/115 guys. Hell, most of the Commanders seem to have less than 2K hours on them, and that's including the 114's from the 70's. The 114/115 guys seem to get 150-160KTAS, so it's not terrible by any means. It beats 182's and runs about even with the PA-24's, while having similar useful loads between 1-1.2K. If ultimate speed is your thing, I don't think it'd be the aircraft for you, but for overall comfort and ramp presence it's got to be hard to beat. I can't think of anything truthful I've heard from non-owners about parts availability, it's always hearsay and tales of parts being unobtainium. The few owners I've had the opportunity to talk with seem to have no qualms whatsoever about the parts.
As was mentioned, the Commander group members are fiercely loyal, and that comes from being happy with the aircraft. It also contributes to how high the prices are for the Commander market, compared to other 4-5 seat aircraft in the same category. Many seem to have updated panels and nice interiors, with most appearing to be in covered storage most of their lives. When you go searching for PA-24's, etc they are usually much more spartan on panel/interior and the paint on many examples leaves much to be desired.
If I had $75K to drop on a SE XC machine that could actually haul 4 adults, I'd have the Commander on my short list for sure. $.02 from a non-aircraft owner.