I have the mag c210-300 evo III, wIth out the added cab you can still get the warm tone given by Ashdown, its just more restrictive. I added a 115 for the warmer fat end and left the 210 for clarity and punch. It almost feels that the 115 has a slower response time, which is great for the warm fat tone, but I would definitely think that 2 15's would bet just too dull, mix it up, spread the risk, go for a cab with 10" and a tweeter