Reply to Adding a sub woofer

Hey, so I purchased 2 KRK RP8's and I'm really satisfied, love the sound. I keep hearing from people that I need to add a sub, and yes I would like the extra "push" so to speak.

My question however is regarding overkill. I have a fairly small room and even without the sub they produce decent bass. I was believeing of just getting the KRK 10S but I'm not sure if it'll be too much for a small bedroom or if it'll just compliment the sound nicely.

Any experience with this set-up or advice would be appreciated, thank you!