Dear Mouse experts of ESR,

How are you guys?
I have a quick question which I need your expertise on. I have been using the 1.1a for a decade. And currently the past year, I have been using it on 125hz (coz Windows 8).

I really want to have a mouse that is capable of 500hz but I dont know which one would be the most suitable for me. Because the shape of 1.1a gives me orgasms while I play and in my mind it's the only mouse I really like.

I have seen some Zowie mouse, but they are like a freakin cellphone manufacturer, just too many of them. Which one of those would be suitable?

Let me know your suggestions. Thanks in advance.

PS: I have a MX518, DA 2007 here. And both feel like a brick to me. Especially the DA. It's super heavy.

Ive had my intellimouse for like more then a year. Its a fine mouse, no complaints. But underneath it, it says "Intellimouse Optical"

So my question is, how do you know if its 1.1A?
And lets say it isnt, is there a big/noticeable difference?

I actually doubt that if there is a difference between those 2(if they are both different mouses), that I would go look for 1.1A, unless of course the sensor is crap of the "intellimouse Optical"