I'm a Saints fan and thankfully we have the 2nd pick this year.
Usually we suck enough to miss the playoffs but don't suck enough to get a Top 5 pick...
If Bush somehow were to fall past the Texans (I don't see this happening) then I'd pick him... I don't think you can pass up that much raw talent and gamebreaking potential.
Since he won't fall I would say Mario Williams or D'Brickshaw Ferguson at #2... Leinart looks tasty but I think Brees has a couple of good years left and the Saints need to win NOW
to revitalize the Gulf Coast fan base if they have any hope of keeping the team in the region in the future IMHO.