I'm thinking that it'll be interesting to see what guys say here. For years the franchise QB was king, followed by the BPR stud WR. QBs are still important IMO, but I've seen plenty of average QBs with the right bars win bowls. IMO, the stud WR is where it's at these days and I'm seeing them go for a king's ransom in trades lately.
I still think QB is the most important and coveted position in the game. WR's are a pretty strong runner up though. Seems like a talented receiving group can really elevate a QB's level of play, and even great QB's are limited if they don't have talented targets. After that I'd probably say DE for a 43 defense, I'm starting to think a really strong pass rush will give you more incompletions than a good secondary. Plus more sacks, sack fumbles. That said if a great CB or S falls to me I'm not going to snub my nose at the chance.
I think OL and DL is more important than RB's or LBs. I've seen plenty of nothing special hb's pick up 5ypc behind a talented OL, and I already mentioned I believe in the power of the pass rush.