Speaker and amp compatibility


I have a Rogue Audio Sphinx v2. I am looking at a used pair of 
KEF 104/2 Reference Floor-standing Loudspeakers

They are 4ohm with a max 200 watt.

The rogue puts out 200 at 4 ohms. Is that sufficient or would I need more power. I am a newbie and this is probobly a really basic question for you guys.

Thank you ahead of time
Charles
cpdkee
One quick note - don't judge the power you are using by the position of the volume control.  The knob position does not correlate directly with output power.  At the hallway point, it could be putting out 50 watts,  watts, 100 watts, 28.7 watts, etc.  Many amps have high input sensitivities, so they go really loud early in the volume control range.  It makes you think you've got a really powerful amp, but you can run into clipping before you get anywhere near the top fo the volume knob rotation.  
KEF 104/2 are a fairly benign load.  Your Rogue should be pretty happy with that type of speaker.  Hopefully the KEFs come with the Kube that goes into the low level signal loop. 
I was going to say those old wooferS in The box KEFs rolled off a cliff after 50 hz without the kube, but since everyone uses subs these days no big deal