Replacement for Snell M7 Bookshelf Speakers


I’m thinking about replacing said speakers. The M7s I have right now are awesome because they image very well, have bass that extends down to 40 hz (these are stand speakers!), and can handle a lot of power. However, I find their lower mids to be muddy, and their treble to be a bit recessed. I would like a new set of speakers that still retains these positive qualities while also cleaning up the somewhat smeared frequency response. Any suggestions? Buying used is a given, and they need to be bookshelf speakers. Less than $1000 is my pricepoint.
muffinhead123
The M7s image very well, have bass that extends down to 40 hz and can handle a lot of power. However, their lower mids are muddy, and their treble is a bit recessed. I want new speakers that retain the positive qualities while cleaning up the opportunities.

Any suggestions?  Must be bookshelfs and less than $1000. 

I have an option to buy a used pair of M7s for $100. I'm exploring inexpensive used speakers just to try something different. 

Sounds like you want it all, which isn't a bad thing.
What did you choose? 
I run a Kenwood C2 basic preamp in concert with a Kenwood basic m2a power amp. More than enough power (conservatively rated at 220 watts) with amazingly transparent fidelity. I play both vinyl (through a Technics Sl1200mkii) and lossless digital CD rips on my system (through a transparent DAC). No sound treatment in the listening environment. I listen to metal, electronic, psychedelic, jazz, and acoustic music.
It amazes me when people have description of sound such as this what are you're room treatments, associated components in you're Music Reproduction System, source materials, format preferences?