Focals any day. Rokit 6's are often said to give the most balanced sound of the series. I think the 8's go to around 45hz where as the 6's go to 48hz, without the problems of an 8" speaker.
Rokits are not terrible, it's just a lot of terrible people own them.
TBH mate I would get mackie HRE mk 2's, that's what most big acts making d'n'b/breakbeat use, youtube danny bird, chase and status, breakfastaz + in the studio, if you want to check. http://www.dv247.com/studio-equipmen...rs-pair--68131
35hz bass response, more than you need.