King a hallinger transmission would be better for a street car but it's $13,000 or more.
I have written a lot about Nissan Skyline GT-R gearboxes. I have used a lot of combos, gearsets, drivers, etc over the last 12 years. You can make things survive better, or longer, but it depends on the driver and the car.
http://www.gtrusablog.com/2008/06/broken-3rd-gear-nissan-skyline-gt-r.html
Holinger sequential is a good box, but its not that streetable. The OS88 I haven't had much personal experience with, but my friend that worked on the R34 team with me, had experience with both boxes and says the OS88 is much smoother. When we purchased the Holinger used, we paid $12k for it in 2006. Since then the US dollar has got so weak against the Aussie dollar that its about $18k new.
What do you want to do, go fast in a straight line, or shift gears?
At one point, you break anything, so they all need to be maintained. We broke shifting balks in the Getrag, not the hard parts. Rounded some dogs in the Holinger a couple times. Broke 3rd and 4th in PPG gearsets.
http://www.gtrusablog.com/search?q=holinger