Which should I buy?(Guitar Pedals)?

I'm debating between a Wah Pedal and a Loop Pedal. I've been playing for about 2 years and I just got my first Overdrive pedal, and I have enough to buy one more pedal with enough breathing room. I play a lot of blues and soft rock, and I'm okay at guitar. If you don't know, a Wah pedal makes a "wah wah wah" sound when you step on it. Try looking it up on Youtube. And a loop pedal records what you play and you can play it back. Also, could you suggest a manufacturer or model for the pedal I get? Thanks!