the stetsom is a one channel. You won't get left and right.
Go with the taramps even though it's less power.
But on a reals, the human ear is most sensitive to midrange frequencies, so you'd have to take down the volume on the mids anyhow
DJ mids designed to keep up with 18" subs in huge fridge sized boxes. I doubt you have that in your car. Taramps would be fine