So far Furius Baco for me, however I've not ridden THAT many Intamin's, Shockwave is a decent Intamin/B&M mash up for what it is though.
As for Stealth and Rita, dire coasters. Rita's better layout wise though, don't see the point of launch, top hat section, airtime brake run, corner and station, at least with Rita it's figure of 8 can provide intensity and air time if you're sat in the right seats, even if it's still a fairly tame coaster.