I too looked for options, I believe if the mbl's do it for you then stick with them. No other speaker does what they do!!!!!
Being a big mbl fan I'll mention some speakers I like, not sure if that helps: Wilson Alexandria xa, but those are the only Wilsons I like, the Verity audio line, Magico mini's, Vienna Acoustics. The only speakers to have dethroned the mbl's are the Alexandria and just recently heard the Symposium reflection, awesome speaker, very dynamic and life-like. Worth giving a listen!!