From what I've seen, 19t's are the way to go for TD04 now. FWIW, I ran 11.4 @ 124.7MPH on DR650's with stock intercoolers in FL summer heat and humidity 4 or 5 years ago. A well tuned and driven DR650-powered car is easily a consistent mid 11 at stock weight. Everybody will tell you 'go 16G, blah blah blah...' but it's easy to spend someone else's money.. There's still a lot of value in a straight 100% no BS bolt-on turbo that's 11 second capable.
BTW - If you haven't already, check out
NW3S 3000GT and Stealth Car Club