Replacing the footjets in the lounger is a great idea. However, I just can't imagine anything replacing the massive flow of the jetstream jets in the bottom of the HS. The salesperson must have had something tweaked wrong if you didn't think the 3 jetstream foot jets were enough.
My advice, see if you can find a dealer with a HS Grandee filled. It has a jetstream jet on one side, so you can reach your arm in to feel it without having to do a full wet test just to check out the jetstreams.