I've always been a fan of Horst 4-bars. If you're anti-Specialized there are several companies who still pay to use the design.
That'd be my recommendo
__________________
"Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming, "WOW, What a Ride!" - unknown
"Your Bike Sucks" - Sky Yaeger