They are what they are... if you have pre-facelift lights then you can fit face lift lights... these can be bought for 80 quid a pair from ebay... you can fit a HID kit (although its technically illegal) but the projectors on A3/S3 8L's are pretty dire..
You could craft in the projector units from another car potentially (S2000's are supposed to be fantastic) but its prob more work than most people are prepared to do...
I was going to get some Depos but went for 2nd hand OE Hella ones in the end for £60 each and glad I did! They were badly oxidised but I followed the wet n dry method with a high cut rubbing compound afterwards and they came up like new!
Took about 2 hours to sand down properly and to get rid of all the stone chips / oxidisation but got there in the end.