Logitech G303 or Logitech G502 if you don't like the shape of G303. The best sensor on the market at this moment. I would like to change to something different than G303 but there is no better mouse at this moment than G303/G502. The same thing you will hear on overclock.net forum.
It is 220 zlotych for G303 in Poland so ~50€? Most of the best mouses have similar price.
Zowie FK1 and FK2 are good too, Steelseries Rival is ok too. Don't buy Razer.
I have Logitech G303(clawgrip) and I get used to this weird shape.
Koreans still use Logitech G9x for SC2 but I don't know why
. Mouse with G9x shape and G303 sensor would be sweet.
Btw. fingertip can fk up your hand. I switched from fingertip to claw grip because I had weird ache(pain?) from fingertipping.