GXP or SLE.. hmmm... GXP!
And what is it with all you guys saying that the 3.8 NA is more reliable than the 4.6 northstar? Are you really serious? Even after seeing SO many 3800'* with the intake failure and the bottom end being destroyed by coolant leaking into the engine, you still say that the 3800 is totally bullet proof and better than a Northstar.
Maybe I'm just crazy, but I haven't heard of any northstar engines of late EVER having problems with coolant leaking internally into the engine or hydrolock etc that the 3800 is getting known for. If anything they have small problems that could be an annoyance, but for the most part you don't have to worry about the engine hydrolocking or SEIZING one day. (it'* rare.) The older northstars from the mid/early 90'* had problems, sure, but that'* when it was a brand NEW engine and design. The later model northstars ARE reliable engines. It gets old always hearing "the northstar sucks" like some parrots yet nobody seems to have a definate answer why the 3800 is so 'superior.' Modability is not a valid answer. Our 2000 SLE with 62,000 miles already has a coolant leak problem with the throttle bodyAND the engine leaks oil out of the intake and valve covers. Our SSEi leaks so much oil that you can smell it burning as you come to a stop or the car is idling. Both cars have gone through a water pump as well. My 'northstar' engine has had ZERO problems with similar mileage. (52,000 miles VS the SSEi'* 58,000 and the SLE'* 61,000.) It leaks no oil or coolant whatsoever and no, it doesn't burn any oil either.
To me, if the northstar was such a "bad" engine, then why the hell woudl GM be using it in its PREMIUM vehicles. They wouldn't. Cadillac wouldn't be using these engines if they were junk. GM wants to build a reputation of their expensive cars being reliable and powerful. The northstar engines are premium engines from GM. They aren't made so much to be sporty, they're made to be luxury oriented.