I compared the Skullcandy Aviator along with the Sennheiser Momentum in the store with my mobile phone.
They were the best 2 sounding headphones in the store, and imo they were in the same league, they only did different things better.
Sennheiser Momentum had: larger, more spacious sound, better imaging, instrument separation and detail.
Skullcandy Aviator had: A LOT more clarity, and same timbre, but also a little harsh on bright recordings.
Can you compare the bass quantity between the two? Which is better for Rap/Hip-Hop? How do they compare to the X1?