Personnally, ive bought the bla bla bla Sound, and these kicks bangs HARD...As for other, Vengeance seems like the ''M-Audio'' of samples, good sounding, but nothing incredible...That new Dubstep kits is hot tough, and...Simplosive Deep Kick arent bad too, SM101 Club Kicks are really nice too. The 2-3 last official kits from Hip-Hop producers Superstar O got also sum nice electro samples. Hope this help!