Re: A warning! Not the chen swords!
I would not recomend the nami iaito.
All the nami iaito i have seen, the bohi are very shallow and do not produce alot of tachi kaze even with good cuts. This was a problem when we were testing students a few months ago and we were supposed to count how much tachikaze each student got out of 500 swings. The results were poor which didn't make alot of sense untill one of them said that they had always had trouble getting the chen iaito to "sing." Sure enough, We all struggled to get it to make a sound. And when we did it was very quiet.
Other than the low quality bo hi. The chen iaito is probably a good deal if you can't afford one from swordstore.com or tozando.