Amp choice

Hi everyone,

I was curious if anyone knew of a price effective way of doing this. I was thinking of getting a Skar audio VXF-15 (1500 RMS, 3000 Max either 2 or 4 ohm options), and planning on getting another in the future to have 2 but right now I'm only planning on getting one. Should I get two mono 1500 rms amps or a two channel (1500 rms per channel) amp? Also, I would need amp recommendations for it along with which ohm sub I would need.