which mice have you used in the past?
any shapes/mice you particularly like or dislike?
i'm not a full lefty, but for left i have a DA. to me it's a pretty comfortable mouse, but unfortunately a bit too big and a bit too heavy.
meaning; i can't grip it well enough to be able to use it well in FPS games and such. i'm just not quick/accurate enough when i must lift up the mouse frequently.
i suppose there's a reason you specifically mentioned 2 side-buttons on the right side,
but if not, then you could look into the intellimouse 1.1 and the steelseries kana v2. both mice have 1 side button on each side.
unfortunately for me, the side-buttons on both mice are a bit annoying to use with my ring-fingers.
the kana v2 and WMO are probably my favorite shapes for both right and left, but the WMO lacks side-buttons, and i can't really use the side-button on the kana with my ring-fingers.
unfortunately i'm not aware of many mice that have 2 side-buttons on the right side. i don't think there are that many.
i have the zowie FK2, but unfortunately that one's a bit too small. the way i have to grip the mouse cramps my hands, and just doesn't feel comfortable.
there's the steelseries raw, but i have never used it myself. looks comfortable enough, but i'm not interested in laser mice
i think the zowie am also has buttons on the right side.