What really are the most effective room treatments?

Hi chaps, I am planning on treating my room after hearing the control that Guildford audio gained with a lot of bass traps. Anyway. Where do I start with all this? Was thinking about writing to GIK acoustics for advice. What manufacturers should I consider - who makes decent (room friendly) treatments? I can't have huge tube traps - panels are the way for me and they need to be cream. I don't want the room to look like a studio. Many thanks

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