I have a 2004 Civic EX which I bought last June and I want to upgrade the sound system. I am trying to decide between the Clarion ProAudio VRX755DVD and the Kenwood KVT815DVD. Is it better to have a hideaway unit, like the Kenwood, or have it all built into the indash unit, like the Clarion? Also if I remove the compartment underneath the stock unit can I place a double din unit like the Kenwood DDX7015 in the dash? Thanks to all who respond.