Morris' contract runs out after this season, and Duhon has one extra year...so I wouldn't say that one will be our backup for a long time. For all we know, Morris could be overseas next year, while Duhon turns into Aaron McKie and sits our bench as a player/coach (or, is traded, which I hope happens to both very soon).
With Nash, we do have a nice PG...but it will hurt us in the long run, because simply put, we don't have the assets to trade for one anymore (can't trade Gasol for one yet, since we have Nash...no point in that, leaves us with a hole up front), and we don't have any decent draft picks to use for one. Free agency will have to do, and right now, I can't say we're looking like we can guarantee a curious free agent PG a chance at a championship.
Well by long time i mean long time this season. I highly doubt we have any future with either.