In the late 90's and early '00 we Used to sell a lot of these at my shop, the main importer was in Maryland, very decent quality, They actually sell a shock and spring matched combo which is a nice intermediate compromise in price between just springs, and a full coil-over kit.
Since the Versa has pretty weakly damped shocks, any chance you have of swapping them out at the same time is a good idea.
Tein relies on their reputation they get from their higher end products N1, Rally Etc. but their low end is no better then some cheaper options.