I have street slamers on my Nightrain, I like the feel a lot better than stock.

 

I ordered the carlini 9in cant wait to get them in next week...
On the NT I like the low bars so if I were to do the original tbars I would only do a 5 in rise. My 2 cents. Wish you the best..

 

Lots of things to upgrade on a Night Train, don't know why you'd want to change Bars though, Ijust bought a 08 New Night Train in Dec. Took it to New Orleans the beginning of Feb, I frize but it was a great ride I love the set up forward controls and the stock bars!!!
I've heard people complain about the bars and also the seat, I had no problems, Mybe it's a hieght issue,I'm 5'10 donno, but u goota be happy right!!!!