I was ready to buy Yamaha monitors, but a sound engineer, a friend of mine, encouraged me to choose tannoy. At first, i felt sucker because they are pretty stiff, not so loud But! Whatever i mix with them is what i hear (at 70%) from any kind of speaker later. That is huge for me. I heard my mix from big speakers, with headphones, in the car ,from my laptops speakers, with small cheap speakers. Everytime the basic sound shape was there at scale. You can realy hear with them what you really mix. I gess bigger wofer (502, 802) will increase volume as well. For my 25 square meter studio 402 are just fine.