The best deal for something to put on the Armanda is just to go directly with Stillen. They have Stage 2 at 6K and Installing it at a Nissan dealer is all about who you know there. It can be really expensive but it depends. And no matter what you wanna do it with them, unless you don't care about voiding your warranty.
You should contact Jerseyparts (Brian) with Yournissanparts.com he can give you a heck of a deal on one. with our ClubArmada and ClubTitan discounts of course. You can PM him here or over on CT.
Also if you have any questions about the S/C from Stillen you can PM Got_Titan over at CT I am sure he can answer most of them. By the way we dynoed hit S/C'd Titan at our NJ meet a couple weeks ago and he put down. 424 HP and 445 TQ. That was with 22" rims also.
Not bad numbers if you ask me.