Options list for C class

[supermono]

I'm getting the 350e which is "sport" spec, and considering the option packs. The only two that interest me are premium and premium plus, naturally the Burmester sound system is the big appeal of the "plus" so a couple of questions...

1. Is the sound much better than standard, and is the standard very good? Subjective I know but opinions welcome.
2. This COMAND thing; cat comes with satnav anyway so do I get much more with COMAND? HDD sounds useful and map updates but hotspot worthless since my iPhone provides one anyhow. Is the screen better resolution?

Any/all opinions welcome please. Car build date November so I have plenty of time to decide...

Also if there are any detailed web resources explaining about this I'd like to know where they are please.

[supermono]

Useful input thanks, I never use the voice thing on the Jaag, although maybe I should, but the better screen and tech there plus obviously the Bermester are the kickers.

Not too worried about the roof or ambient lighting, though I'll be glad of them.

[supermono]

Update. I've added prem plus to the order after this advice thanks.

So, C350e, Beige Leather (actual leather not plastic), Hyacinth Red, 360 degree camera, prem plus, both leads @8m.

Doesn't seem like that much of a list but the premplus has a bunch of things. Anything essential I've forgotten?