S4 and Big Brake Kits???

[KWeiner64@aol.com]

Anyone have big brake advice for the S4 - I want to run my stock 16x8" 5
spokers in the winter so from what I've been told I can't go bigger than
12.4" (314mm) rotors (FYI - the stock rotors on my car are 276mm or 10.9").
 So far I've only talked to two vendors and so far my choices are the
following:

Hoppen:  use the brakes from the current A8/EuroS6+ which are 314mm rotors
and bigger dual piston calipers with all mounting hardware and pads - cost: a
cool $2650

TAP:  AP racing 4 piston calipers with 314mm rotors, braided lines, fluid,
pads - cost: $2150.

Anyone tried these systems or driven a car that had them - any
advice/opinions greatly appreciated.  Anyone think this sounds like too much
dough for this stuff - Is there anyway to do this for less with same quality
and part availability??
Unfortuneately,  I have all these go fast toys on my car and my brakes no
longer feel adequate.  Any other options/alternatives appreciated.

If I do this - anyone interested in the stock front brake parts??

TIA
Marc 
94 S4 - (MTM 3.0 Bar ECU, RS2 manifold, Cone filter, 3" cat back exhaust,
SAMCO lower intercooler hose, bilstein/Eibach suspension, 17" Borbet Type C's
with Conti Sport Contacts 245/40)