I've made two lagers so far with good results. Of course one of the fun things about this hobby is to try to get better results
Mr Malty recommends a 5500mL starter for my next lager. I'm lucky enough to have two stir plates (one performs better than the other) and two Erlenmeyer flasks which are 2L each. Neither stir plate performs very well when the whole starter is >1500mL.
My idea would be to make a normal starter of 1500mL and let it ferment out. Turn off the stirring and let the yeast floc.
Make another 1500mL starter in the other flask. Decant the 1st starter and add the new starter to the 1st flask (the one w/ the yeast in it). This should bring the volume to approximately 1800mL I'm guessing.
Clean the 2nd flask (the one I just dumped into the yeasty flask) and make a new starter, this one ~1200mL. Stir up the yeasty starter and divide the volumes and put both on stir plates.....pitch into the next lager.