eyeballer

I bought mine today, $224 from MSY, a little more than I was hoping it would be

Unfortunately I've already completed the game in its inferior state!

I'm going to guess this is a just because kinda mod...

Sometimes.

Just get a mouse that is comfortable. Sensors and CPI are pretty much the same for the most part since almost all mice use Avago sensors and not many people actually need a 8200 CPI sensor tbh. Although a forward and back button on a mouse is great, but you don't need a 'gaming' mouse to get it. 
 
The important questions you should ask yourself are. How do you like to hold your mouse? Do you have large or small hands? Do you prefer large or small mice? Do you want a heavy or light mouse? How buttons do you realistically need and are going to use, (if you don't know I just recommend going for a 5 button mouse; left click, right click, scroll wheel, forward and back buttons)? What is my budget?
 
Also having a decent mousepad does enhance the experience of a mouse. Also if you're using a 1080p screen I would personally recommend going for a mouse with 1600 CPI or higher, but this also depends on your grip style and how you prefer to move your mouse. Personally I use 8200 CPI, but 99% of people think that is uncontrollable. 
 
EDIT: Answer those questions and we can give you some decent recommendations. 

I find it easier to refill the AIO's at the sink with a spare psu to power the unit.  The 100i has a aluminum rad and you need to use a anticorrosive coolant.  Something like Fesser Base, it's Elthylene Glycol base, mix is 50-1 with distilled h2o..  There are some good you tube vids and refilling AIO's.

A bit of a challenge to refill an AIO unit but it CAN be done... I'm curious though... Why did you unscrew the copper heatsink from the block?

What the real question is here is whether the title was a pun or not.