Eight escapes nice. The cost of having Roman install the buttkickers and isolation feet is about the same as buying them yourself. Buttkickers in front and none in back would be exactly how i would do it. I would love to have more escapes in back but the support poles in my basement make that very difficult. One other option you can consider to save some money is to have lagoons in the back. That would make the front row true premium seating.
Dolby Atmos 7.2.4 Marantz AV8002a processor Gemstone 200x7 Emotiva upa-500 amps
Oppo 103 Sony UBP-X800 4K Ultra HD Blu-ray Jvc RS500 projector Vivitek 1186 projector
Carada 110"BW screen Monster HTS 5100 MK11 power conditioner
Golden Ear Triton 5 L&R &super center XXL triton 7's sides Martin logan motion 12 rears
4 RSL C34 in ceiling SVS PB2-plus sub Outlaw LFM-1-plus sub