The 5.7L HEMI is the only engine DC puts out right now in the Ram's that seems to not respond positively to TB mod's. I have heard nothing but positive reviews on TB mod's on the 4.7L engines. Had I not sold my 03 Ram w/ 4.7L to upgrade to an 04 w/ 5.7L HEMI I was going to run one myself.
Can't comment on any specific brand just know that it seems to be a very worthwhile investment on the 4.7L's. Good luck with it.