A good piano song for me?

I'm looking for a good, and complicated, piano song to play for a recital in the future. I'm only level 4-5ish, so nothing level 10+ or REALLY hard stuff. I like classical, beautiful songs that flow and feel calm, but not sleepy. Like Yiruma's River Flows in You (already know) or Canon in D (same). Know of any long(er) pieces that are really beautiful and slow, but not too hard to learn? Links to youtube videos would be helpful :) Thanks!