I am a big UA fan.
Cabela's has some of the best prices around.
and UA definately shows off all your hard work in the best light.
I usually wear the UA shorts, a pair of plain shorts over, and maybe a UA polo shirt to work out.
If I might suggest - if your gym is a little stylish or cruisy, or if you are just hoping it is - one of the hottest trends lately are these 'special edition' athletic and running shoes. Try to find a nice pair that stand out, show that you have your game on, but aren't totally over the top. ex.:http://www.rbkcustom.com/content.html