I urge you to reconsider selling the 2.7's, at least until after you try to make them work for you. You don't give much detail about what you don't like about the sound of your current system, or what you want to find in a new system. I think you can upgrade around the Maggies and get a system that will sound much different(better), especially if you can spend $1000-$2000 around them. Earlier this year, I thought about selling my maggie 1.6's because my system produced pretty severe listener fatigue. I decided to try to a few things before selling, and I am very glad I did. I put about $1000 into various upgrades, and it has made all the difference. I'm still contemplating some upgrades, but my Maggies aren't going anywhere. This is what I did, in chronological order:
1. Room treatments (Auralex foam in corners behind speakers glued to foam insulation panels. I spent $100 and got a $1000 improvement. Best money I ever spent!
2. Sold Adcom GFA- 5500 and bought a McCormack DNA 0.5 and PS Audio Statement power cord. This cost about $500 net. Again, a major improvement. The 100 wpc McCormack with the statement power cord is a huge improvment over the 200 wpc adcom. Much better and tighter bass, much smoother treble.
3. Signal silver speaker cables (biwire) replaced AQ-4's. Again, much improved base, and significant reduction in grain. This ran about $270.
4. Replaced Kimber PJM with Signal Silver Resolution between Denon DCD 1650 cdp and McCormack TLC-1. This cost about $130, and took the last bit of grain out of my system. They need a lot of burn in time!
Seems to me like your Maggies might suprise you with a better supporting cast.