Maybe it is just me, but I'm not impressed with what Genelec has to offer in their lower-tier products. Power specs are way too anemic for the price they are charging. Maybe they won't sound as flat as the Genelec but maybe take a look at KRK RoKit or Behringer Truth series for more bang-for-buck. If the OP wasn't in the UK, I'd recommend Emotiva Airmotiv/Stealth monitors. They are an excellent value price vs. performance. Emotiva is phasing out their Stealth 6 monitors at $800 a pair -- that's 210 watts RMS per speaker. They are huge and heavy but that all goes away when I'm pushing music through them.
Denon AVR X7200WA, Emotiva XPR-5, Emotiva XPA-7, Sony XBR 75" 850C, Oppo BDP-103D, Roku 4.
DefTech BP7000SC (L/R), CLR3000 (C), SM55 (FH), UIW BPZ/A (SB), UIW 75 (TM).
JBL L7 (Sur), EoSone RSR 350 (RH).
PC 2.1 setup. Emotiva Stealth 6, SVS SB2000 sub, Emotiva DC-1 DAC.