Hi i'm Brad and i'm a new 2004 xfr owner

I'm looking at shop manuals on Ebay and see the 2004 is 2 of 2 manuals and 2006 is 3 of 3. the 06 are the cheaper ones with 1 more book. Do i have to stick with the 04, i wont be doing anything big, ill leave that to the mechanics..just need your regular backyard car info. Thanx.