This set: Klipsch Bundle: 2x RP-8000F + 2x RP-600M + RP-504C + SPL-100 + Onkyo TX-NR797 $2199 & More + Free S&H
With four of these: C34E Ceiling Speaker - RSL Speakers
Will give you a pretty darned good 5.1.4 setup for well under your total budget.
Sell the SPL-100 sub, and purchase a pair of high-output 12" ported subs from SVS, Hsu, or Rythmik (to start).
You could also sell the Onkyp AVR and purchase a Denon X3700 and an external 2-channel amp for your rear Atmos channels, if you wish to go directly to 7.1.4. That AVR is -usually- about $1300, and an amp can cost around $150.
With four of these: C34E Ceiling Speaker - RSL Speakers
Will give you a pretty darned good 5.1.4 setup for well under your total budget.
Sell the SPL-100 sub, and purchase a pair of high-output 12" ported subs from SVS, Hsu, or Rythmik (to start).
You could also sell the Onkyp AVR and purchase a Denon X3700 and an external 2-channel amp for your rear Atmos channels, if you wish to go directly to 7.1.4. That AVR is -usually- about $1300, and an amp can cost around $150.