I'd that case, I'd take 1 QB and 2 WR with my first three picks...(in order)
Rodgers, Brees, Rivers/Schaub, Schaub/Rivers.
Marshall, White, Crabtree, Jennings, Bryant, Desean, Rice
....then I'd hit rounds 4 through 6 for RBs (not in order) like Moreno, Best, Matthews (likely gone), Green, Wells, McCoy, Felix, D. Brown and another QB (Stafford, Roethlisberger, Kolb or Manning if you're lucky) Smith, or Henne.
Get out of the first 6 rounds with two RBs under 25, two QBs under 29, and two WRs under 27 and you will have a very enviable dynasty team that will start killing people in 2011 and beyond.
My "Year Two" article will be out in about a week but the point is this: dynasty players, particularly in new dynasty leagues, worry too darn much about winning this season at the expense of the future. Just watch: Joe Addai and CHad Johnson will likely go before Jahvid Best and Percy Harvin which makes for a great 2010 and an AWFUL 2013. If you expect this league will actually survive more then a couple years (and most dynasty leagues do not) then you are doing yourself a favor to get as many RBs under 26, as many WRs under 28, and as many QBs under 29 as you can possibly stow away. Once the league gets its sea legs, you'll be shocked at how much value you can get for a player like Vince Young that you selected in round 8 a few years from now when other teams are watching Manning, Favre, and Palmer exit the league.
Good luck. Hope it goes well.