I have two, either of which I can recommend. Would suggest you double check both can charge iphone, I only use them with Ipod touch.
Bose one for the Kitchen which sounds good http://www.bose.co.uk/GB/en/home-and-personal-audio/digital-music-solutions/sounddock-systems-for-iphone-and-ipod/sounddock-digital-music-system/
Logitech for the bedroom, but also handy for days out as it has chargeable battery pack http://www.logitech.com/en-gb/speakers-audio/ipod-mp3-speakers/devices/4320