I've had my D300HC for about 5 years now. I also used to have an older matching 2-channel. Both amps were/are great. I'm using the D300HC on a 15" fiQ (build in progress). The amp is rated 600wrms@4ohm, 1200wrms@2ohm and 1900wrms@1ohm. Mine is not modded to be one ohm stable but with the gains set low it runs fine, never gets warm. the FiQ15 is going to be reconed to dual 1ohm soon so I can run the amp at 2ohm. It benched over 2100wrms @ 2ohms 14.4v.
The amp is a power house especially with the small footprint it has. I'm not sure about their new stuff, don't really care for the way the new amps look but if the build quality is the same looks don't matter too much. I don't like flashy stuff anyways //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif