I have the OEM size Stillen drilled rotors & metal matrix pads. I put them on myself and I am quite happy. I would imagine you will be very happy. I see you already have big wheels so you should be set for the big rotors. The Stillen rotors seem to be alot harder than the stock rotors. There are some big bolts on the front brakes (holding the pad holders or torque members as I think they call them) that are soaked in thread lock and present a bit of a challenge. I think I used a 23 mm (something big around that) socket and a breaker bar, although an air impact wrench would probably work better. I have SS lines and DOT 4 fluid and also speedbleeders.
www.speedbleeder.com make it a one-man operation to bleed the brakes. I also used CRC Brake Quiet. If you change the stock brake lines be careful on the angle of the connection to the calipers so that the lines are not stretched and don't rub anything when you turn. The stock lines have a locating pin that controls the angle, while the SS lines I put on didn't have those locating pins. I just tried to match the stock brake line connection angle and I didn't have any problems.
Be careful so as not to spill any brake fluid on the paint or overflow the master cylinder under the hood as brake fluid is bad for paint.