Hmm, maybe it would be a good idea to stick with a bobo battery. I heard the Yellowtop was a good battery for "sitting" for a a period of time without draining too fast. I only drive her on weekends so she sits all week. Found that by keeping the alarm armed, it drains down quick, so I started just manually locking it without arming it. Still, ever few weeks, I end up having to jump in, but usually only in colder weather. I may have to rethink this one some more.
Considering new wheels once I resolve my brake issue. My wheels are about 12 years old now and have some minor day to day nicks, but still not bad at all. Havent looked about too much but what little I have, all I can ever find is crappy bling wheels for trucks. You know the 19"+ Kardashians you typically see with rubber bands wrapped around them on Escalades. Wheels are definitely not high on my list for now though. Eventually I will update. Fan of the BFD since it resembles the Volk TE37 though. http://www.fnwheels.com/new-products/bfd/
Yes, A/C needs charging. NEVER BEEN! I rarely use it with the S/C since it tends to "warm up" on me, but on some occasions, the 2 will get along.
Not too concerned about traffic protection since I don't use it on commuter days. So no real concern about bumpers or a hitch. I know what you mean though.... I take I270 north and south just north of the beltway every day, and it pays to drive a junker or a tank.
Sound system is still quite pristine. Fully replaced Alpine and JLAudio components with too many bells and whistles to list. My system is quite a gem. 
I MAY consider a dual exhaust Y-pipe axle back. If anything, for that "cool" visual factor. I have the original PV right now so I would need to consider a few things beforehand like, should I stick with the PV....
Gary Noonan
'01 S/C VX / '18 Forester XT