I'd say Lakers, maybe Magic, maybe Pistons.
Few teams have cap space. Fewer need point guards. Some teams will be scared away by Lowry's past inconsistency, his history of health and character issues.
Pistons have Jennings but I could see Dumars just signing him anyway. There's a history of signing talent over fit in Detroit.
Magic are trying Oladipo at point guard and have Nelson as a decent placeholder. Besides, they'll have a high pick and this draft has a lot of point guards. So they may be off the list as well.
So I think the Lakers are the biggest competition. I suspect they'll miss on their main targets, target Lowry or Deng some other borderline all-star, and then focus on 2015 free agents.