Great gift for your 1 year! I use AW IMR 1600 mAh, two are 3 years old, but they still last all day on a 1.6-2.0 coil. I would get 3 batteries.
A regular Grand and an RM2 is all you need, so if the LP color, RM2, etc. is not in stock, you won't be disappointed.
Get a button cover right away...