2004 would be the best year, if you aren't messing with the car, because the 2004 had the ls2 style timing chain, and a chain damper.
2003s can hold value to a smaller market, as it is the 50th anniversary
2002 is also a great year to choose, because the fuel pump is much easier to access (also the same for early built 2003 models)
2001 will be easiest on the wallet, but were 385hp not 405hp... but none of that matters if you are modding, except your sweet zo6 emblem wont say 405hp, lol.
you cant go wrong with any choice though.