Never buy a mouse on looks. Look for comfort, even if the specs aren't quite as high. The biggest problem using a mouse is RSI which you really don't want so choose a really comfortable mouse that suits your style of gameplay. I'd go with the Func
As downing said, go for a mouse that you think will be comfortable for you. For example I chose my Sharkoon Darkglider based on the mouses I has enjoyed previously as well as how I knew I held a mouse and just made an educated guess as to what mice would fit me hand/grip than narrowed it down from there based on price and features.
Since I dont know what kind of mice you prefer I can't really make a suggestion. If it was me personally I would go for the Func though, the Corsair M65 has a bulge on one side that looks uncomfotable.
You should try out a few, it's a lot about your grip style (claw, palm, hybrid) and your personal preferences. I personally use a Corsair M90. I play SOME FPS's, but personally liked how the M90 fit my hand, the weight, feel, etc. The only drawback to the M90 is the software that corsair provides, AWFUL.