Just looking for a bit of lows in my daily driver. Will have box built to spec, can I get a recommendation?

[schwol]

Pardon the basic question. Bringing my SoundQubed S1-1250 into my new-to-me 2016 Hyundai Tucson. I'm not going to add an amp for my door speakers (blasphemy I guess). I'm going to hold off replacing them for now, I think. I don't know if I should run my amp at 860w@2ohm or 1260w@1ohm and for which sub. Fi Alpha V2.1 (750w RMS), Fi Xv3 (1000w RMS) or an SA-12. I've got a builder who will make an enclosure to spec. I'm leaning toward the Fi Alpha at 2ohm, leaving electrical overhead for a 4ch amp in the near future for some new door speakers. Is Fi good shit? Should I just grab the 1ohm version, instead of 2ohm and set my gains right?

[AaronT]

B2 or incriminator