How costly would it be to put the newer front grill from 05 on my 03?

check LLtek they sell the conversion kit. Then add install and paint.

looks pretty lame - if this is what you are refering to:
http://www.lltek.com/PRS_bin/prs_132_A6_body_kit_success.htm

Well I don't like it but he asked and it is the only kit I know to get the new front end on the C5

right right - I wasn't questioning the advice you gave - obviously that was correct

I question the quest... :)

Thanks for the info. After pricing it all out I could have just bought an 05. Hey Kerosene, Im happy with the look of mine but thought if it was cheap, why not make it look newer

I like the 05 look a lot too - the problem is that the panels are quite different shaped so the bodykits end up looking fugly