Benefit to double or single DIN?

[Gadgetech]

I'm going to replace the HU in my non-Bose Z. I initially though I'd go double DIN since that's the size of the opening but thought I'd ask if there's a benefit to a double DIN if I don't plan on installing a radio with GPS? I'm hoping to find a HU that will have a similar color to the rest of the lights in the car but the more I think about it I may be giving up a great HU b/c it has blue lights...IDK.

Main features I want:
- BT HF Calling
- BT audio streaming
- CD player
- HD Radio would be nice
- SiriusXM compatible
- RDS

Long term I plan to have a nice 2.1 setup speaker wise.