Should i buy Droid Mini ?

Hello guys i am thinking to buy Droid Mini. I own a Droid Razr HD with locked bootloader. I love flashing custom roms but unfortunately i cant do it on Razr HD. Also because of low ram, i m deciding to switch.

I need to know some things before i confirm my purchase:

1. What system and android version can be rooted?

2. What system and android version can be unlocked (BOOTLOADER). (Is sunshine app used to unlock bootloader? any other way to do?)

3. When official lollipop update is out on Mini/Maxx/Ultra. (any idea?)

Thanks!