Hey man I got the Mr Brown one! suitable for indoor use. I love its sound.. not cheap and weak like the cheaper cajons or even the $400+ Schlagwerk ones at Ranking. Feels really rich and booming hahah, and I'm pretty sure it sounds way better when seasoned!
You can go to their shop, it's called Beatabox and they're at scape. They'll let you try all of the seven cajons they have there and even tell you about proper playing skills (a bit la haha)