Having recently purchased a Denon AVR-X2300W Receiver, I'm wondering what my next step to improving my system should be. My set-up consists of a Samsung UE46F6400 TV, a Sony BDP-S490 Blu-Ray player, A Humax HDRFox T2 PVR, A Rega Planar 2 turntable, Kef Q35 front speakers, Q15 rears and Q95C centre plus the AVR-X2300W. I've never got around to adding a subwoofer as the Kef floorstanders handle the bass pretty well, but now I'm wondering if perhaps I should invest in one? My local dealer has the Tannoy TS 2.8 on sale at £199 - which seems like a good price for a sub, but is it a worthwhile buy or should I look for something else? The other option is to go down the route of adding extra speakers to take advantage of Atmos but there doesn't appear to be a huge choice and prices start near the price of the sub and go off into silly money! So I'm thinking of spending £300 which makes it an either/or choice for a sub or Atmos. Which way would you go? And what would you buy with that budget to fit nicely into that setup?