Let's just put it this way:

In terms of difficulty, Japanese is easy to pick up but gets progressively harder as you learn more advanced structures of the language. Chinese on the other hand, is just the opposite. The basics is very hard to grasp, but once you get past that stage the rest is relatively easy to piece together.

QUOTE:
I like how the Japanese language sounds when spoken a little better than Chinese, which to me sounds slightly obnoxious at times. However this isn't a huge factor for me.

Chinese when spoken properly can sound just as pleasing to the ear as Japanese. The reason why it sounds obnoxious at times is because the majority of Chinese that you hear today is actually spoken with an accent (This can be attributed to the many regional dialects of the Chinese language). Finding someone who speaks "perfect" Chinese is pretty rare in my opinion.