Hi. I've recently moved out to the suburbs with my girlfriend, and have found that my Quad 12L bookshelves really struggle to fill the increased space (17' x 32') of our lounge.
Can anyone recommend speakers that will fill the room adequately, whilst matching the clarity of the Quads? I've auditioned the 22Ls and they didn't strike me as significant of an upgrade. I appreciate that powerful and high-quality is an exacting - and likely expensive - remit, so recommendations of speakers to look for second hand are especially welcome.

In case it's relevant; they're run off a Nad 752 surround receiver along with a MJ Acoustics Reference 1 mk II sub.