We too have had blowers on plenty of DDs, sell all major brand name blowers, have sold hundreds of FI setups and tuned thousands of FI customer vehicles.
Short list of our most recent personal vehicles:
2015 Chevy SS: Whipple 2.9
2013 Denali XL: TVS2300, meth
2013 Silverado 6.2L: TVS 1900, headers
2008 TBSS: TVS1900
2004 Z71 Tahoe: Radix 112, headers, cam
2003 Silverado SS: TVS1900, headers, cam, head swap
1972 K5 Blazer: TVS2300, 6.0L swap, headers, cam
SMOG legality aside (even though TVS2300 will be SMOG legal soon), as many States don't have to worry about that, all major brand name blowers will net huge gains over stock with some having a higher price tag. For the OPs consideration, more than a sales pitch is needed.
Some minor things to point out:
-Whipple is considerably more expensive than the TVS1900
-TVS1900 will not be overtaxed and will be well in its efficient operating range
-TVS1900/2300 is a considerably easier installation than the Whipple
-Coolant tank: IATs are comparable between Whipple and Magnacharger
-Both Whipple and Magnacharger make very nice kits that any customer would be happy with
EDIT: Even though this thread is for 07-14, the TVS2300 is SMOG legal for 2014+.