I am running an NX EFI kit with 125 jets. I agree about the hemi/mopar thing- but the LS1 is much more refined and is a better match for the "refined" side of the Crossfire. Not to mention, it is lighter than the Hemi and that in itself makes it a better match for the Crossfire without throwing the handling off too much if any. I wouldn't mind doing a Challenger or Cuda with a twin turbo late EFI hemi though.
I understand the quality and R&D and have been in the business for about 14 years now- they are overpriced.

The guys who really make power shake their heads and laugh when we discuss their pricing and such. However, for the guys with deep pockets who can't do their own work and care about the status quo- their work is top notch, but if it were any "lower class" name on the car, the work would be 40% less. Come on- $1000 for an ECU reflash?? I would do it for less than that WITH dyno tuning when I had my shop and although the cars may have been LS1's, LT1's and some Haltech DSM's, a custom tune is just that. They get $1000 for a "shelf" tune. Once the hard part is done (the original tune is setup), it is a 10 minute affair to reflash an ECU and even at $300, you are making nice $$$. The name shouldn't affect pricing, but unfortunately, it does.
I have done several custom blower and turbo installs from brackets to piping. There is plenty of room in the crossfire for a centrifugal blower- look on the passenger side above the alternator.

If you get a reverse rotation (pulley faces motor)- you can put the blower right in between the radiator and valve cover- a TON of space compared to some of the stuff I have done. Worst case, I would have to get a slim fan or cut/fiberglass the corner of the stock shroud for clearance if needed. It would just make an alternator swap more time consuming, but that won't be an every day affair. Not to mention- it is much more efficient than a roots- and you can intercool it easily. If I could find a stock roots setup for the right price, it would be worth bolting on and making a new pulley for to try to get a bit more boost, but if it is going to be too pricey, it isn't worth it. I really want to turbo the car, but will not be going into the motor right away, so boost will be limited and 6-7 psi on a blower would feel better than 6-7 psi on a turbo- no lag! If I get into the motor and do pistons and all and can get it to 8.5:1 or so, then I'll turbo it and run a "real" setup.

The blower will just be quick and easy for now.
Joe