Unfortunately, the 4.4i after the facelift had some moderately serious problems. Many people had problem with the transmission. It ended up being a software problem. Also, many owners had the levers in the cylinder head that control valvetronic, replaced. Between the new 6spd tranny and its shi**ty software and valvetronic, the 4.4i after the facelift might actually be faster and give better milege, but they just aren't as responsive or satisfying . I think the Dinan S2 would change all that though .