Well the fork and deck are identical to mine so I will actually have a good opinion on this...
Keep the bars, deck, and headset...
But I would recommend not getting a DSA HD fork, yeah they are tanks but they are visually unappealing as could be and they are overly beefy/heavy (for the front) and can throw off your riding on certain tricks. I would recommend throwing down the extra cash for another ICS compatible fork.
Now for the clamp: DON'T BUY BLUNT, get an SZ standard size clamp or FRID oversized or something... anything, hell even a rubber band will do the job better than that thing!