If I have a 1070 receiver or a 990 preamp and I have 3 separate Aragon amps, (4004/4004/8008) which all put out 200 watts per channel into l/r. Can I distribute these into speakers l/r, sl/sr, sbl/sbr and buy a 2200 M amp for the center channel to have all 7 speakers connected at 200 watts each?

What are the benefits? What are the detriments?

I already have two preamps; are these necessary with the 990 or 1070?

I currently own two Aragon amps and I would have to spend about $875.00 for an additional Aragon amp and the Outlaw 2000 M amp, which would be less than $2000.00 for another 7700.

Any help would be appreciated. Thank you in advance.
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Outlaw 990/7700, Oppo DV-981HD, Gallo S.A.Amp, Nucleus Ref. 3.1, AV C, AV M, TR-2, Paradigm Atom, Pioneer PDP-4214HD, Mtrola DCT6200/2005

Outlaw 990, Aragon 8008X3, 8008, Denon 3930CI, Dahlquist DQ20, Outlaw LFM-1+, Paradigm Atom, Mtrola DCT3416 I