I do like sleeper for sure.
My other option (which is the most likely), is going with the pod up on the dash and an srt pillar. Which is really less likely to be seen than one would think in my opinion.
However I really like that quad pod. I don't plan to do more on the pillar than the srt. If I can't get this one, I'd rather keep them more out of sight, while keeping them more in the line of sight. I really like the pod up on the dash, I just really hate to drill holes in my dash but that goes with the quad on the dash as well.