Not sure how helpful I can be but I myself recently was looking for an ideal mouse. If you feel lucky you could try a Razer Deathadder. I was recently looking for mice almost considered getting a deathadder before coming to geekhack. All the stories about poor build quality and quality control on top of needing an account for their cloud based software to change mouse settings was enough to steer me away from it. Otherwise I liked the size and feel of it. I have bad luck to begin with last thing I want to do is dealing with returning something or dealing with customer service. Either way I think your taking a chance when getting a Razer product.
From what I have read and heard, the Logitech G502, although much heavier, is supposedly the better choice than the G402 as long as money isn't an issue. If you like the shape and the amount of buttons its probably one of the best choices considering it has a 3 year warranty. It was one of the mice I was considering but then I realized it had way too many buttons than I would actually use.
As for other mice I will list some that I came across and the ones people on here suggested. Wouldn't hurt to check these brands out for their other mice. Most of them have the 3310 optical sensor, but you should be able to easily find them on amazon for all the details on what sensors they have and what not. Also not sure how MAC friendly these mice are so I apologize in advance if I listed any that are not compatible.
Roccat Kone Pure Military: I hear a lot of good things about this mouse, in fact it's the one I chose to get and I can't wait for it to arrive next week! It appears to be a medium sized mouse, I just
hope it doesn't end up being way too small for my bigger sized hands. They also have the Kone XTD which is a bigger mouse with weights and a laser sensor. The XTD also
comes in optical if you are lucky enough to live somewhere you can get one, it is the mouse I originally wanted but wasn't paying $150 to get it to where I live.
Zowie FK/FK1: An ambidextrous mouse that is plug n play with no software to deal with. If I liked ambidextrous shaped mice, it would probably be the one I would get.
Mionix Naos 7000: Another mouse I considered, it is big full palm grip mouse. Crossed it off my list cause I was worried it would be too short.
Corsair M45: The one I almost got, it's practically a cheaper optical version of the M65 without the FPS side button and aluminum frame. Good build quality according to what I read and was told about it.
Changed my mind cause of it's shape, didn't want to order one and find out whether I would like the back end of the mouse. Also seems built more for claw grip so decided against it
considering I like to palm grip my mouse a little sometimes.
SteelSeries Rival: Figure I should mention this one since I bought it a month ago. Got it on sale and thought it was decent, sadly I had to return mine because of a faulty mouse wheel. Not sure how good
the Rival's build quality is overall but I didn't want to give it another go cause it involved going to another store since I had the last one from where I got it. It was probably just a bad
experience in my case. I liked everything else about the mouse except maybe how far forward the size buttons are, but that is a pretty minor issue.
Don't really have any first hand experience using any of these mice, either way I hope this helps a little. Overall I think the best way to choose is to figure out what shape and size you need for you hands and grip style then go from there. The input I got on here definitely helped me choose mine.