Challenging myself to workout harder with a treat of new gym clothes – with your help!

Can anyone suggest where I should head to buy some fabulous, but reasonably priced, workout clothes? I’ve been wearing the same ones for years and think it’s about time to treat myself to some new ones as an early Christmas present considering how much time I spend there. Am hoping that the clothes will help inspire me to be more adventurous with my workouts and they will also be helpful for when I start these new bootcamp and yoga classes with my friends. If anyone has any suggestions, I would be really grateful! Love the stuff on Sweaty Betty, but much too expensive now that my sister isn’t working there and can’t get me discount now! Hope you can help me, fellow bloggers!