Pound for pound, I personally, and a lot of track day racers reckon that their race spec shock is better value, and equally as good as the ohlins equivalent.
I've had the sport model on my hornet 6 which was very good, my mate bought the track version for his Ninja 9 and it was fantastic, totally transformed the rear. THey're also completely rebuildable and servicable, nitrons customer service is fantastic in my personal experience (had an issue, they came and picked the bike up, rebuilt the shock and didn't charge me a penny - even when it turned out my bike was actually at fault rather than the shock!), and they're also modular, so are easy to convert over to fit any new bike you'll buy!
Only downer really is they don't keep their values quite as well as Ohlins do, but as long as you don't give up riding for good and sell it, that doesn't matter!
Oh, one other downside, I'm not a particular fan of the turqoise springs they use, but they have black and reds too so it's all good!