You have two choices, either move up in the Wilson line; you're not going to find any better modern speakers, alternatively, there are some incredible vintage horns and speakers that will amaze you, specially in combination with the ML2s. This is something that we specialize in and have a lot of experience in very musical and natural sounding systems.
Here are a couple of links from this site on our last show
http://forum.audiogon.com/cgi-bin/he04.pl?damokallc&21&ManuList&&&&&&&&#OPH
http://www.6moons.com/industryfeatures/he2004/he2004.html
http://www.6moons.com/industryfeatures/hecandy/he2004.html
Here are a couple of links from this site on our last show
http://forum.audiogon.com/cgi-bin/he04.pl?damokallc&21&ManuList&&&&&&&&#OPH
http://www.6moons.com/industryfeatures/he2004/he2004.html
http://www.6moons.com/industryfeatures/hecandy/he2004.html