Today I bought the Urban Armor Gear Cobalt case for my Surface Pro 4.
It is a pretty good case and does make the Surface Pro heavier but boy does it give some protection. Feels very solid.
Once you use this case you probably won't need a carrying pouch as it is good enough already. The case was a tight fit though and did cause some problem for my glass screen protector at one corner but I think it will be fine. Overall the case is pretty good.
I like the pen holder on the top. Now I know where I can put the pen when I am using the surface as a tablet.
Also I can give my 4 year old daughter my Surface Pro 4 to play and draw around. I was worried what if she dropped my Surface Pro. Now with this new case, I can relax a bit and let my daughter have some fun, too.