Best Amp/Preamp Combo-10M, 15M, 20M

Seeking advice---looking to pair amp and pre, in price range as listed above---seeking best (subjective of course) reproduction of stereophonic sound---speaker suggestions are welcome, if you choose to add--

I am looking to go more upscale---and not wanting to just thrash about in high end stores on my own---so, if you have something to add, it would be most welcome. Thanks.