Replacing a 1.1 microsoft intellimouse

I have a Microsoft Mouse 1.1 intellimouse that perfectly fills my needs (games: FPS as CS, Q3 ... of video editing on Adobe Premiere ...).
Since this mouse is no longer available (or at least at a reasonable price) I opted for the V2 as backup Kana mouse.
This mouse is very similar to intellimouse but I think my right hand prefers microsoft mouse.
If you loved the intellimouse 1.1 and are looking for an equivalent mouse, I suggest you this model.
In any case, I regret not having bought one or two intellimouse 1.1 backup.