I wouldn't go aluminum - its heavy and doesn't do much for the car, you are better off getting upgraded RPM plastic all around which includes the arms and hubs. You will be way happier with the durability going that way instead. There really isn't any good aluminum out there for it anyways, just the lower end stuff that looks good but gets loose and sloppy quick.
Aluminum shocks, however, are worthwhile. Getting a set from any of the other brand stadium trucks out there, losi, AE, etc... and their aftermarket is the way to go there. Proline powerstrokes are okay but overall a second tier shock compared to what I just mentioned.