Reply to KRK RP6 + 10s vs Yamaha HS80M

I currently use the KRK RP6 G2s for production. Which one would be more beneficial:

1. Get a 10s sub
-If I get the sub I'll be able to tap into the sub bass frequencies but I know the Rockit series are not exactly natural sounding.

2. Sell RP6 and get Yamaha HS80M
-If I get the HS80M I'll miss the sub bass, but I'll be truer to a natural sound.