Is A Kicker DX 500.1 A Good Amp To Power Two 12" Kicker Comps?

Yes. Those subs, when wired in parallel, will be 2ohms...and each sub wants 150W RMS (300W RMS total for the pair). That amp is rated at 275x1@2ohms but kicker underrates their amps so I would expect it to actually be about 300-350W which would provide the optimal power to those subs.