I must confess, I misunderstood your question at first, and I was going to tell you that quinoa is a grain-like seed and not a pasta. It sounds like you are already aware of the health benefits of quinoa. I was not aware anyone was making it into a pasta, but it sure makes perfect sense to me. I will have to look for it at a store myself.
Of course, making quinoa into a pasta means it has been processed to change it from it's original whole-grain state, but it probably has much higher nutritional value than regular pasta simply because quinoa contains a higher level of nutrients than wheat. You can easily check the label for values of protein, fiber, phosphorus, magnesium, iron, etc.
I am a big believer in avoiding most processed foods, but if you are craving pasta, and you found quinoa pasta, I say go for it! Please remember spaghetti squash as well. It comes out just like processed spaghetti from semolina, yet it is 100% fresh vegetable with the only processing coming from your oven.
From Wikipedia article on quinoa:
Quinoa was of great nutritional importance in pre-Columbian Andean civilizations, secondary only to the potato, and was followed in importance by maize. In contemporary times, this crop has become highly appreciated for its nutritional value, as its protein content is very high (12%–18%). Unlike wheat or rice (which are low in lysine), and like oats, quinoa contains a balanced set of essential amino acids for humans, making it an unusually complete protein source among plant foods. It is a good source of dietary fiber and phosphorus and is high in magnesium and iron. Quinoa is gluten-free and considered easy to digest. Because of all these characteristics, quinoa is being considered a possible crop in NASA's Controlled Ecological Life Support System for long-duration manned spaceflights.