Agree with this, the UA cold/heat gear/tech tshirts are really good. Nike stuff just seems to last too. Had a pair of Free Run Flyknits that I wore every day on my commute and they lasted a good 2-3 years before I wore the sole down too much. Nike trainers also come with a 2 year (From date of manufacture) warrenty.
For the gun show!
I've found wearing the right clothing makes the exercise more enjoyable. I've used random stuff before and it ends up getting annoying by flapping about, riding up or in general being in the wrong place at the wrong time
I remember getting a pair of gym trousers from them and it was some of the poorest quality I've ever seen in my life! Primark trousers were way better. They were very thin, shrunk quickly and the seams tore within a week. Oh and the screen printed logo was coming off too. I wouldn't bother, you're better off spending a few pounds on trousers in Primark, or spending a bit more on a better quality brand.