Levinson 23 or 331 - which one would you take?

consider the 23.5 instead of the 23 its supposed to be much better

I have a Parasound A21. It's the 1st expensive amp I've owned and I really like it. I have an opportunity to buy the Levinson 20.5 mono's for a good price. Anyone out there with experience with Levinson of this era. Sure, they're certainly from a different price class but they're old and I'm worried about having to replace thing's like the cap's which, I'm told, wear out after about 10 years. The electolyte wears out or something. I heard this when researching Krell amps on the Gon which, if you look, often advertise being serviced if they are older.

I wish I had taken the 23. If you read the previous post you can see why.