Ouch, I truely feel your pain mate, I really do.
Also, do i change piston rings on all four?
What's the mileage on the car, and did it smoke on before you took it in? If the mileage is reasonable (Up to and including 100K) and it didn't smoke, don't worry about them.
They phoned to question how far i wanted to go with replacing parts while its apart. Do i get second hand conrod for approx £50, or 4 from audi at £41?
Have they got any idea of the cause of the con rod bend? Your situation is so similar to mine (except mine was so bent it shagged the block as well! D'oh!).
Mine was running Revo software as well.
When I found the cause of the problem was a bent rod, I asked myself was it worth fitting standard rods again. Bottom line - it's bent one. This means it can bend another one. The standard rods in the S3 engine are *****. Why why why would you build an engine with a forged crank, and forged pistons, and then join them together with rubbish? If standard rods from Audi are £41 each, and you are considering replacing all four, then it's only an extra £100. Plus then you'll need to buy big end shells for them (as you would anyway with standard rods).
I chose to cough up the £300 ish quid for IE Rods from Badger5, and I would suggest you do the same.
OK - extra spend I grant you. BUT (and this is a big but) how would you feel having all this work done, and then bending another rod, and then having to go through it all again.
That was my thought process and £300 for piece of mind was £300 well spent.