I know exactly where you downloaded those samples and they are free from loopmasters, i have them on my hard drive, dont be lazy atleast chop them up. This sounds really out of key, big room is simple but you should have done more to the sounds and create a better build up. Dont be discouraged, i go to school for sound engineering and it took me awhile to figure out how to make my clips sound in key. keep working and try to invest on purchased samples because if your going to do this for a living everyone is going to have your exact same sample packs on their HD as well.