Integrated Amp W/Remote that I can ad my own amp. And use the Integrated for preamp only.


Need help. I have a vintage Marantz and I truly love the sound of Marantz. My audio friend built me a stand alone amp. I borrowed his preamp so I could hear it. The amp is 25WPC which is plenty for my Klipsch.
I swear his amp sounded almost identical to my old Marantz integrated but better. Very clean, clear, detailed and that touch of warmth like my Marantz.
i would like to stay with a Marantz integrated with remote and be able to use this awesome amp he built for me.
Been in this hobby a long time but since my stroke I have a hard time in trying to understand just what model if any I should buy. I know I could get just a preamp but when I find one that I like with remote it’s way beyond my retirement budget.
if need be as I don’t know if I have to look for something other then a Marantz I certainly will consider.
something pre owned in the 450.00 to 750.00 would be nice
Thanks guys for any input and suggestions you may have,
Dave
audioelevations
In that budget range New I'd suggest you look at Schiit Audio Freya SS or Freya + depending on if you want tubes or not. these are getting wonderful reviews. 
https://www.schiit.com/products/freya-s
https://www.schiit.com/products/freya-1

If you want to stick with Marantz I'd look at vintage, I'm not an expert in that area though but will ask a friend who owns a vintage audio shop what the best pre amp models are to look for in vintage and post tomorrow. that said 3800, 3600, 3300, 3650, 7T are well regarded. 
I appreciate your response, I may not have been clear. I really prefer a Marantz integrated  with remote that I could use as preamp only and use the amp my friend built for me.
i am looking for used.
i am going to look through the link you sent, looks interesting 
Why do you want an integrated to use as a preamp,why not just get a preamp? Marantz has made preamps for years.