Since most of your lights are CFL, you should stay away from X10's two wire switches (WS467, WS12) They are for incandecent bulbs only. They do not work well with CFLs, unless an incandescent bulb is in the circuit also. As a newbie, you probably do not want to go down that road.
ON-OFF wall switches for CFL are XPS3 which are X10 Pro line (
www.X10pro.com). XPDI3 wall switches are dimable and also X10 Pro line. These switches are are "three wire" switches, meaning they must have a a "hot" line, "load" line, and a neutral line in the wall box. Many homes do not have the neutral line (usually white in color) in the wall box.
The link is a pretty cheap starter set for home automation and has several plug-in or screw in modules which will work with CFLs
http://www.x10.com/promotions/cm15a_am466_home_ql.html?QL#up1