I'm just about ready to do the 114.3 hub swap into my RS Liberty (pretty much same as gc8). Total cost of parts so far incl wheels and tyres and wider track width control arms front and rear is around $5000.

I still need to paint my wheels and then its all ready for fitting.

EDIT:

This is the break down or parts and costs for the 114.3 conversion into my car...

All prices include shipping and taxes:

Front 114.3 hubs: $430
Front Shafts (new): $300
Front Arms (GDB): $190
Front HSD coilover hub brackets to suit 114.3 Front Hubs: $100
Rear R180 114.3 hubs: $700
Rear Arms (new adjustable): $700
Rear Shafts: $400
Full set of Slotted Brake rotors: $730
2006 STI wheels with 90% R-comps: $1200
New Whiteline RCK - tie rod ends and hub ball joints: $250

$5000 total and it hasnt even been fitted yet.

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RS Liberty - Because WRX's are only good for parts...