I'd suggest you get it once you're 10th dan.
Non-Qi items turn normal after buying them, so basically, they're just a TC Sink.
Try getting toxic force with camo lax.
Cool combo.

You could always check how it looks in the ingame shop. that way youll know how it looks before you buy it

From owning pure, I love it. It blends with everything almost as easily as void does. My ruling on no-qi items is that they are only worth it if you have OVER 5k games left to play. Otherwise just be extremely active for a few months and keep earning tc for other items in the mean time. I personally find that pure and Orc, pure and vampire, pure and toxic, pure and supernova, and pure and marine look really good. Though the decision is ultimately up to you. Hope I was able to help man. ;P