I'm not sure I'd ever find it worthwhile to go collect the DVDs (especially since SVU is the only complete show, and it's probably my least favorite of the three).
Complete? Not quite. It's only up to the 8th season on DVD, but the current season is the 10th.
Still, it's a damn sight quicker getting released than any of the other versions. The mothership is only up to season 6 on DVD, and they're in, what, the 19th currently? Shit, it'll take ages for that sucker to get completed.