I spend a long time to optimize the settings in slic3r (0.9.10b). You can find the configuration file for download below.

Important adjustments are

• limiting the acceleration (or there may be a permanent shift in the x direction sometime during printing)
• when printing with a relatively low filament temperature of ABS, the warping is considerably smaller, and the surface has good quality
• printing the outer perimeter first results in smooth surface (due to the proper shutdown of the filament flow after modification of the extruder as previously mentioned)

In repetierhost the speed now can be increased by moving the slider for speed control up to 200% or even 300% without much loss of quality depending on the object you are printing.

slicer 1.0.0RC2 available! 

configuration files for ABS and PLA in download section