Normally I'd say MSI. I own a MSI now and have owned others over the past. However, the 4gb VRAM makes the Sapphire 380 more attractive. Get that one. Sapphire is decent in quality but not as high as MSI (in my opinion). But you should be fine and the reviews look promising.
http://www.eteknix.com/sapphire-nitro-r9-380-4gb-graphics-card-review/15/
Only negative mentioned is lack of backplate, but that is common for GPUs at that price point.