Putting in a new rebuilt engine on a 2005 4.8is and while we're at it?

[RedsoX5]

Hey there looking at all possibilities. Any suggestions on modifications to increase sound and performance a bit? Meaning ECU tuning, X pipe, Headers etc.? We already have a new Remus exhaust ready to go.

But before my guys put in the new engine just thinking about tinkering with a few more things. Figure i'm in this thing now for the long-haul. After all though I only paid $9200 for it in great shape on the surface, the engine blew (I already posted about that!). So as long as were putting in a new engine I figured maybe will add more on if anybody has any good suggestions. Maybe a new air intake? Have not asked the guys yet I think they said it's pretty limited as to what's available.