what kind of gym shorts do you guys use/recommend? Nike? Champion? adidas? Under Armour? etc? i need some new ones since all of mine are old & falling apart...I tried some on at Sports Authority & the Medium Nikes were too tight in the leg but fit the waist, while the Larges were fine in the legs but too baggy on the waist. then they were either too long or too short. Do you guys just size up on gym shorts? What's a good inseam to get that's not too long & not too short?