I think the Pb/pc2000 would be a good choice. Iirc, the 2k series were in the outlet for 799ea. As far as setting up 3 subs, I personally use a minidsp but you might be able to use SVS’s built in peq, although it only has three bands available. As Kurt mentioned most of us are set it and forget, so app control may be of little value. Ymmv.
In any case, an investment in rew/umik will be necessary to get the absolute best out of any subs. Also, being in the exact center of a room is really bad for bass performance, even with multiple subs. I would consider moving the LP.