Hi folks. Feel like a muppet asking for help to be honest but I have been on a 5.1 setup with fairly mediocre speakers (not mine! ) for so long that I want to get this sorted first time with experienced help rather than just my gut. There are already so many holes in the walls from where different speakers etc have been over the years that I can't really experiment this time around. The current spec is: Sony KDS-70R2000 TV Onkyo TX-SR605 7.1 Reciever Media Centre with lots of HD material Tannoy TS12 Subwoofer Mordaunt Short 302 front satellites and 304C centre bolted to bottom of the screen Mordaunt Short 903S Bipole rear surrounds I have already bought an additional set of 903S surrounds to add in as the 'middle' surrounds but want to get this set up as ideally as possible. The 304C is slung pretty low under the TV, angled slightly upwards and the front 302's are at about 3.5-4ft up if memory serves in order to clear furniture etc (http://www.ftaclan.net/clanftp/nick/misc/kds70r2000/IMG_0411.jpg). The current 903S bipoles are mounted high at about 7ft and deep in to the corners as housemate/landlord wanted them mounted out of the way. I would want to mount the new 'mid' surrounds at the same height for some symmetry I was going to take my time with this but with our new bling motorized sofa suite arriving about 2 months earlier than expected (tomorrow) I need to crack on. I have done a picture of the room layout currently, shown below and roughly correct measurement-wise: Basically I have 3 questions please: 1. At what point down the room should I put the new extra surround speakers? 2. Will using another set of bipoles in the middle be ok or should I be using a set of 302's there instead? 3. As you can see the Tannoy sub sits directly beneath on of the 302 fronts but when I ran the cabling I ran a spare sub out cable to the area shown by the lined sqare by the door. I realise that it is all a case of experimenting and seeing what suits the room best but should I be putting it at the rear instead and going from there or leaving it in the front corner? This does currently make the bass in the back right corner of the room (diagonal) far more powerful than the rest of the room as expected from reading guides. If anyone feel like taking up the 'paintshop challenge' and putting down where they think the extra speakers should go or can give advice on the rest I would appreciate it. Cheers, Nick . P.S Moving the chairs etc is not an option, only speakers!