Do not underestimate the difference a solid AMP will make to an average pair of speakers. In most cases the distortion is as much down to the inability of the amp to control the cone as the cone distorting.
Having said that the K range of Focals are a good step up on the Performance range.
Adding the amp to the upgraded Focals will give you a real boost. Especially with JL amps they have been good in my experience as well.
