Improving handling without lowering?

My 2011 E93 seems to have more body roll in cornering than I was expecting. I know I can throw some H&R or Eibach springs under it to stiffen up the corners a bit.



But my issues with that are:

1. I will then need to replace the factory struts/shocks as well (or do coil-overs which are out of budget for now)


2. It will lower the car more than I want

So the questions are:

1. Are upgraded sway bars worth the price if I am not going to do springs/dampers at this point?


2. Is there something else I can do to counter-act the roll in cornering (other than slowing down)?