Power Amplifier Longevity


Hi All, 
I am venturing into the separate component world and was wondering how long a good power amp typically lasts.  I may have access to some older Lexicon CX and LX series amplifiers.  However, since they are discontinued and nearly 20 years old from what I understand, should I be concerned with how much longer they will last?  If they do need servicing, is this something that is available at a reasonable cost?  Or should I invest in newer equipment?

Budget is a concern for me which is why I am interested in these older (higher quality) amps at a reduced price versus spending the same amount on something newer, but lower quality.

At this time, I have a Marantz AV8802A and Vienna Acoustics speakers. 
Main L/R - Mozart Grand
Center - Maestro Grand
4 Surrounds - Waltz Grand

I thank you in advance for any advice provided on this subject.
Brian


brianb339
Show me one piece of information in the following that indicates reduction of capacitance with its voltage rating:

https://content.kemet.com/datasheets/KEM_A4075_ALS70_71.pdf

Remember I am talking max voltage RATING not the voltage APPLIED.
As for inrush current limiters, MOST devices sold today do **NOT** have such current limiters.
All of our equipment has had current inrush limiters installed, going back 45 years. We did this to protect the AC power switches and over the years its worked out pretty well.
Hey atmasphere, good to hear your equipment has them.  Almost all transformers rated above about 300 VAs should have them but most do not.  Expensive gear is obviously better designed and it does.
Thanks
Post removed 
heaudio, I am sorry but you are not making any sense in your capacitance stuff.  Noone is APPLYING the higher voltage.  The voltage is FIXED at the rails.  The ONLY time it moves UP is when there is a surge.  The overvoltage RATING of the capacitor simply is able to absorb the extra max voltage which spikes so it does not blow the cap.  That is why I prefer the voltage rating to be high so that it indeed CAN absorb spikes.

There will be NO change whatsoever in the capacitance of a cap becoz of its voltage rating or by changing the applied voltage to it (unless temperature becomes an issue).

And the thermistors are NTC btw: 
https://www.newark.com/amphenol-advanced-sensors/cl-60/ntc-inrush-current-limiter-10/dp/81F3390

They have to be since they must settle to a LOW value with HIGHER temps otherwise you would never be able get more than quarter of the power of the amp since the current would be limited ALL the time.
A better (but more expensive) way of doing this would be using relays with a timer of course.