Before you do it, ask yourself what you want it for. I mean that for storing other than fresh air, you'll have a huge space right at the bow, ideal for stuffing with crap that will weigh the nose down. Of course, having mentioned stuffing, a good deck will be a real asset if you do stuff.
Redbay went down this road years ago, incorporating a fairly modest tube height bow locker with a decked top. They proved popular and were fitted on lots of open and wraparound boats. Someone finally requested one to be extended back to meet the front of the console, as the little deck there was fairly pointless and looked like a wave catcher. At this point the boat had a full enclosed deck forward of the console/wraparound, accessed via the console hatch or a deck hatch. And around then someone said, hey, we should streamline all this.....