Programs 4 Electronic Music Only Options

[collinmp]

Hi,
I am relatively new to making music and I would like to branch out into electronic music. I know very little about software used to make electronic music. I am looking for a relatively easy program, yet I want to be able to make some music that will not sound incredibly elementary. I have a Mac OS X 900 MHZ power PC I-book. Could anyone please tell me the names of a few programs that are used to make electronic music that will fit on this type of computer. I'm looking to not spend more than $500 on a program. thank you for any help...