I think these kinds of discussions devolve into majoring in minor things. You're driving a 12 (soon to be 13) year old minivan, which is admirable.
Knock yourself out and buy the shit you want to. Incidentally, I spent far more than you pimping out the now 14+ year old Subaru I "acquired" from my wife nearly 18 months ago. As for the CD player, I never use it. It's all about streaming from my iPhone.
Oh, and I just came back from a visit from my in-laws, most of whom talk about how "poor" they are (one family sort of is...sort of...) and yet they ALL drive 2011 cars or newer.
So again, buy your freakin' CD player and remote starter. P.S. I also hate "idling" so I'm giving this advice out of respect for your wants.