I am looking for a good quality security system that I can install myself.I don't want to waste money on junk.Do you have any recommendations?

I would suggest the DSC 832, also known as the PC5010, then newer model was named the 1832.
Out of the box it has 8 zones, and can have a total of 32 hardwired, if you add the wireless receiver, it handles 32 zones. 32 total can be used.
One keypad has 4 programmable chimes for different zones, 1 sound for fron door, 1 for garage door, 1 fro shed in the back(wireless),
Then I have a door/window transmitter in my Truck, If someone opens a door to my truck it sound the Alarm Chime on my keypads, I hear it, they don't.

Oh, they also have an automation board you can add, to give PLC control(X10 type stuff)and remote thermostat control.
Great Panel.

The DSC can do about anything without a computer.
If you are more into computers, then try:
ELK-M1 Gold (http://www.elkproducts.com/products/m1/elk-m1.htm)