If you like those ergonomic mousing like you said, then i highly recommend the Roccat Kone xtd.( i have this mouse and love it). feels great and has alot of light customisations if you like that kind of thing and all round a nice mouse. HIGHLY HIGHLY recommend this mouse. The price is good as well ( $85 - $95 ). Roccat Kone xtd Website :
http://www.roccat.org/Products/Gaming-Mice/ROCCAT-Kone-XTD/
:D