My guess is that the top five picks will be (in no particular order): Nerlens Noel, Ben McLemore, Trey Burke, Anthony Bennett, and Otto Porter.
I'd really love to be able to draft Porter at the #6 slot in this draft, but I don't see it happening.
The most talented pick left on the board at that point is probably Shabazz Muhammad, but he really doesn't fit well in terms of position (the last thing we need is another SG). Victor Oladipo also falls into the SG category, but he brings some tenacious defense and would possibly be a better fit - if we could find a way to get him in the court.
At PG, there's not much outside of Burke and Carter-Williams, but I'm not 100% sold on MCW. His shot is way too broken.
I like Alex Len's size and fundamentals at C. Cody Zeller seems to play a little weak to me and probably ends up at PF, so I might be more inclined to go with Kelly Olynyk if we go with a big man. Obviously Dieng can play some D, as can Withey, but I don't think either is going to bring much on the offensive end.
If we want to get a SF and Porter is in fact gone, our best bet is probably to take a stab at a European player - there's Dario Saric who is 6'10" and has been on the NBA radar for a while, but I'm not sure what he can do; there's Sergey Karasev, who I don't know much about; and there's the draft riser Giannis Adetokoubo who is 6'9", pretty new to the game of basketball, and could be a special two-way player if you fix his shot. I'm not nearly so high on Glenn Robinson as Darth Divac is.
So, having listed all of those guys, we probably take somebody else.