I recently purchased a two channel Emotiva model A-300 for my Denon x4200w for $399. I then added a Emotive Monoblock PA-1 for my center channel for $299. They both sound amazing!
This is just one way to do it, buy 2 channel for now and add center when money is available. I also see Outlaw has their monoblock's on sale for $299.
Pioneer UDP-LX500 | Denon AVR-X4400H | Emotiva A-300 2ch amp | Emotiva PA-1 monoblock | JVC DLA-RS1000 Projector | Mini DSP 4x2 | Dune HD Smart D1 | ZIDOO Z9S | Buttkicker system | HSU VTF-3 MK4 subs(2) | HSU MBM-12 MK2 Mid bass module | Klipsch RP-8000F(2) | Klipsch RP-504C | Klipsch RS-62 II(2) | Polk RC80i Ceiling(4) | Carada 134” screen | unRAID 40TB