AMP or Preamp


What to add next to my system, budget $5000 to $7000?  My current system consist of Wilson Sasha speakers, Yamaha RX-A3050 receiver that I run pure direct, Rotel RB-1590 2x350 amp, Hegel DAC and a Bluesound Vault 2i streamer.  I have been looking at a Mcintosh C2600 to replace the Yamaha receiver to give me the option of adding a turn table at a later date or would adding mono blocks give me the most bang for the bucks or other options?   


nobnewob
Thanks again yes this is a journey. Need to narrow this down and maybe post with a couple caparisons.
I would start with amps first. 2 large mono blocks and 2 mono block tubes. Once you have your base , go for a preamp that best suits your needs. A cherry on top sort of speak. 
Do a search for the Audiogon subject below: someone just spoke about the Belles integrated the other day. I had Belles pre and amp years ago. It was well ahead of its time and at VERY reasonable cost!
<BELLES 250i INTEGRATED AMPLIFIER>
Bent
Replace the Yamaha and Rotel , for a Hegel poweramp, and even pre-amp. No McInt. Also a good option is a tube preamp.: Audio Note, Ear ,..
Also a very good match is GamuT and /or Gato.
Do you want an “American”: best option is Jeff Rowland. All those thinks gives a good sound with your Dac and speakers. For me the best matches. Try them first and  , make a choice.
Enjoy your music!!