I've hired a sound guy in the past, (because sound gear is the one thing I don't have). I'm looking to aquire the same gear that he has been using, (or a comparable alternative) because the resulting quality was great.

http://www.kineticproductions.com/audio.html

I know about standard shotgun microphones, boom poles, xrl connections, etc. But what I don't know is about wireless microphones, receivers, wireless headphones (for me to listen in) etc. I was able to find the mixer and bag in that picture, and I have all of the simple things like the shotgun microphone, boom pole, and headphones covered. Now what I'm looking for is the whole wireless side of things. I don't know what a good setup would be to buy to use with the mixer and my Canon XL1s. I only need to lav 2 people. I want it to be good equipment. Don't so much worry about budget. I would like to get the whole sound side of things for less than $2500, but if I need to spend more, I can.

I think the Sennheiser G2 series are your best bet. I've used them and they're great. At B&H, there are several packages available with transmitter and receiver well within your budget.

G2's are very good. Reliable. If you are using two lavs, you probably need a mixer of some sort. I am a little short on what's good in that department.

The XL1s can use 2 lavs at a time - just record one in the right channel and one in the left. However, you will need two receivers and two transmitters.

Is this the one?
http://www.bhphotovideo.com/bnh/controller/home?O=productlist&A=details&Q=&sku=421965&is=REG&addedTroughType=search