I looked into this back in June myself as I was wanting to be off the wire on my desktop once and for all. It boiled down to three for me. Logitech, Cyborg, and Razer are the most solid mice IMO.
I was looking for a sensitive gaming mouse with fast response time, feels good in hand after long hrs of game play, long battery time, rechargeable over replaceable batteries. Hard to find combo.
$129.99 6400dpi 4G Dual Sensor
Cyborg R.A.T. 9
$149.99 5600 DPI 2.4G
$83.99 5700 dpi
Any of these will be great. I ended up with the Razer Mamba after coming to personal conclusions.
After tyring it I've liked it for those reasons stated above as it did do what I was looking for. Felt good, fast, rechargeable docking station. Wireless with option to be on wire from docking station.
I like the on-the-fly sensitivity buttons that control DPI while in game. I can go to fast paced shooting with higher DPI and lower settings with a few clicks to steady my sniper rifle. All three offer this.
Most gamers prefer wired mice as the response time is quickest. I personally have not found the wireless to be a problem that has hampered me in FPS multi player gaming reactions.
I'm building a kids rig in March and buying a second mouse. I've heard good things about the Death Adder.
As for wired mice there are a lot of good options in this area. Almost too many. I haven't tried it so I can't give an actual experience with it. I've read mixed feelings from those who have. Alot more people seem to like the DeathAdder.
$79.99 6400dpi 4G Dual Sensor or Razer Death Adder
$59.99 3500dpi 3.5G.
Cyborg R.A.T 5
Now to end my reply with my little experience and be up front. After almost six months my Razer Mamba stopped responding off the wire. Turns out I had to RMA it. It happens to all products, just luck of the draw. I don't personally blame Razer the product itself. When it was working I truly loved it enough that it hasn't swayed my mind about it.
Razer Mamba - Wireless Issues
I realize that the choices for less than $100 on your budget leads you right to the Logitech G700 for wireless and any of the other three for wired. I used to own Logitech products and they are great. I can't give advice on the Cyborg, never used them. Read mixed feelings about them.
Read up on all three of them and you'll get an idea of which might suit your needs better and if you'd want to spend more or not. Draw your own conclusion.
One thing I've found, there are no real inexpensive gaming wireless mice.