I would also suggest the kit that roy has on his silvia (c-red) its very neat and clean and combined with some understated rims the car looks smick and neat and alot newer than its true age.
alternatively i would check out the kit that xracing has on its website.. www.xracing.com.au has a PHAT rear bar, but if you order it, then its a half rear bar that joins to its factory rear bumper.. and then jump on JMS website www.japanesemotorsport.com.au and grab a front bar extension and some side skirts from them
stick all 3 on and walla another nice neat silvia, but dont neglect the wheel and tyre package.
lastly, go all out on a M sports or Wise sports or BN sports kit
all drify drifty, try to look up kaminari and hippo sleek kits too
and andrew I want that sub box, i sent an sms to you, let me know how much you want