What's up!
Not familiar with any dealers on the west side of the bay. But here's my experience with the east bay side dealers: I've been to the Oakland dealer and they seem alright in terms of service. The one in San Leandro WAS great at one time until they screwed up something in a TOD sensor replacement issue and also charged me $75 for tightening a coolant hose clamp from leaking.Not recommended. There was one in the Fremont Auto mall that was decent but they no longer service Isuzus. I thinks there's one in Dublin but I haven't had the chance to check them out yet.
There was a dealer in San Jose on Capitol Expressway that I used to go to when I lived in the area. But, I heard they "may have" moved or no longer servicing Isuzus. But, they were the best and really took care of you professionally and even washed your vehicle after each service without charge! I can't remember the service tech's name but he was the main guy there and was really respectful and kept you up to date what was going on with you vehicle at all times. Finding a conveniently located and knowledgeable dealer is rare and unfortunately an ongoing quest for many VXers. If you find one that you feel comfortable with , no matter the distance, stick with them as Isuzu dealers seem to become as common as the dodo bird.
Here's a few suggestions to your list of to dos:
1. Do a search on this as there is a realy easy way to fix this issue by bending a couple of internal metal window components ever so slight to free up the binding issue.
2. Antenna is easy to replace. Check out St. Charles Isuzu to get the best price with fast and free shipping. You can also replace with an alternative aftermarket one from ebay if you want a different look. I believe they are the same used on many Volkswagen vehicles that have the same attachment.
3. Haven't heard any issues about the center console other than the square cupholder issue. Luckily, I'll be designing another updated version of the console which should replace the exisiting one without modification to anything. Also, it WILL have at least one decent siz cupholder maybe two.
You can use washers to help secure the screws with the console as a temporary fix in the mean time.
4. Not sure which seal you're referring to on the headlights. The most common seals that come loose are fixed around the perimeter of the headlight housing. These can be resecured with any rubber adhesive like rubber cement or even crazy glue. I used the crazy glue (gel version) and two years later no issues.
If you're referring to the actual sealant that hold both the internal housing and clear lens cover of the actual headlight, then go with the clear silicone sealant/adhesive as you will see the black through the clear lense.
Good luck and let us know if you have any further q's.
ps. I'm curious if there is enough interest in a possible bay area meet in the future.