I draft more for the current year than the future. If you do your homework, you can keep your team strong by getting the young guys who are later round sleepers. A QB tandem of Bulger/Cutler is easily had, and won't cost you the world. No way would I take a guy like Vince Young right now, as he's projected way too high for my taste. When drafting later round RB's, I steer clear of aging backups like Kevin Faulk. Sure, he can score you a few pts in a pinch, but I prefer to take a young guy like Leon Washington and see if he develops. My RB corps is either starting NFL RB's or young hopefuls.
The main thing to remember, even in a dynasty league, is that the current year is always the most important. With good trades/FA pickups you can have a team that is strong for both current and future years.