Switch from AB to D


I have a Onkyo TX NR 3007 that eats up electricity because of 4 amps inside. I would like to switch to the Vidar class D from Schitt's. I really like what I've read about it and the reviews. I am handicapped and can't get out to listen to any class D units in my area so I'm going to depend on some people here give me a good idea where I'd be going from class A B to class D what's my sound. I will be using the Vidar with a Audio Experience Symphony preamp with three matching Telefunken tubes that have been in there since I bought it and it's serviced me well along with an Audio Experience Concerto Plus phono preamp. I have an older Soto Sapphire turntable with a clear audio virtuoso cartridge wooden body that has been rebuilt by the soundsmith what a great sound. Oh by the way I have an Oppo 103 Player for my digital along with PSB image five speakers which I got for a great deal of many years ago and they still sound good with my system.
So the bottom line here ladies and gentlemen what am I going to experience putting a Class D amp with a hundred watts per Channel in place of my Onkyo with 140 watts per Channel at class A B power?
Thank you much
Ron in Highland Michigan
128x128vinylrecord61
I don't thin it's class D but something like this for 875 if you're looking for a 2 channel amp. 
https://www.audiogon.com/listings/lisa13ha-amplifier-template-2-solid-state

You might scan the listings here there are a few that would meet your price. 
I just recently traded in a high quality class D amp and went back to a class A/B integrated and there is a difference in sound. I enjoyed the class D but the A/B sounds more musical to me. Even my husband, who is not an audiophile, believes the A/B is better after listening. His first words (without any prompting from me) was this is 'more natural' than the other system. Let us know what you decide on---good luck!
I recently acquired some Bel Canto REF500M class D amps and have been very happy with them, upgraded from Rotel A/B amps operating as monoblocks. I was comfortable trying class D amps in my system due to my experience as a bass musician. I use a tube preamp and class D power amp with my bass, and I feel the sound is natural and powerful. I find that the Bel Canto's revealed a new level of detail in my stereo setup without sounding fatiguing at all (listening to a mix of vinyl on a Rega table and FLAC files on a Cambridge streamer).

$750 is really pushing it.  I would steer clear of NuPrime.  I doubt you can get anything decent-sounded below the price of this.

https://www.cherryamp.com/product-page/stereo-maraschino-stm

@vinylrecord61, You received 27 suggestions recommending Class A/B, Class D and class A.   In addition, you received specific recommendations for various brands of amplifiers (excellent information).   Most every post I saw highly recommended something and was very useful.

Your original question was "what am I going to experience putting a Class D amp with a hundred watts per Channel in place of my Onkyo with 140 watts per Channel at class A B power?an easy process?”.   Based on these 27 posts, I do not know if we actually answered your question.  I will say you received many useful and different opinions.

Since you are unable to visit your local retailer, I suggest you contact a retailer (local, if possible) that will loan you two amplifiers, class D and Class A/B, for you to demo in your listening room.
  
Please remember it is your system, your environment, your budget, your other equipment and listening that decides what to purchase. It is not an easy process.   Please keep us posted.