Reply to Dirty Heavy Dubstep Tune. Your Opinions Needed

Here is a little tune i've been working on, i would like to get some opinions, may be this will help me to make it better.

Here are the things witch bother me:
Do the drums sound ok? or maybe the drum track is to loud compared to the rest of the mix.
Is there enough sub-bass? or may be there is too much low frequencies in general?

Any comments are highly appreciated

Thanks

http://soundcloud.com/chaoscollapse/chaoscollapse-trollstep