You will need a subwoofer and crossover with the correct slopes, both HP and LP . This is far more important than any power specs .
Genelec 8030c or 8020 ( slightly worse )
Genelec 7040 ( probably far better integration with 8030c than SVS 3000 = better sound )
Focusrite have good sounding interfaces from 200 bucks, RME ADI-2 is good but maybe overkill.
With this solution you will run balanced xlr cables from the interface to the 7040 that has the inbuilt crossover, then from 7040 to your 8030c , all balanced.
Here is a good thread :
I've been rocking my Genelec 8030C monitors for a few months now thanks in large part to the ASR review and measurements and I've been very, very happy with them. I always calibrate my setup using a UMIK-1 and REW and they just sound perfect. The effect they have of bringing the singer forwards...
www.audiosciencereview.com
View attachment 266002