�130 for a broadband router? Blimey that's a bit steep.
Just get yourself a broadband router (make sure it has a built in hub) and connect up both the PC and PS3 with ethernet cables. Wired connections are so much easier to setup, far more reliable and faster than wireless.
Don't bother with wireless unless you want it for a laptop or PSP. And unless you secure it properly it can provide a way for people to leech your bandwidth.
I use a Netgear DG834 (includes wireless) which half the cost of the one you've found and that's even at PC World. Both my PC and PS3 run through it.