QUARTERBACK. The Raiders acquired Matt Schaub from Houston via trade and they have Matt McGloin, but they could certainly use a young arm to groom. Will they go QB early or later? My guess would be later, but they are the Raiders after all.
DEFENSIVE END. Oakland signed Justin Tuck & Lamar Woodley as FAs, but they could use some depth here. I don't look for them to use their 5th pick for DE.
DFENSIVE TACKLE. Will the Raiders use pick 5 for a DE? I doubt it, but then again they are the Raiders. :)
OFFENSIVE LINE. The Raiders vetoed the FA acquisition of Roger Saffold so OL is a glaring need. I think it will be either OL or QB for the Raiders at #5.
BEST PLAYER AVAILABLE. I would have to say any of the top 3 OTs would fit that description for the Raiders.