...i want to purchase the new droid but i cant because i have a premium plan
You can change your plan at any time....drop it back to Select and add the Droid. If you are on a family share, and a secondary line, you will pay $10 less for the calling plan and then $30 for the data plan, so $20 more a month. If you are an individual plan, the difference is only $10. The difficulty would come in if you are the PRIMARY on a family share, and everyone uses the Premium plan. The solution would be to have one of the other numbers take over as PRIMARY, making your line a secodnary line. Then, drop your line back to Select and add the data pack for the Droid.
So you CAN get the Droid, it will just mean a plan change......entirely doable.