http://www.performancebike.com/shop/...tegory_ID=1130
$80. Had for 4 years and great. A tad warm when temps raise to 85

http://www.performancebike.com/infor...cfm#california
Berkeley, Dublin, San Rafael, SF, Walnut Creek, one of these might be in your travel radius.
If no trips, I'll pick San Rafael.

I would recommend NOT to the get the lime green. If you watch from vehicles often the lime merges with background greenry. Yellow is a better choice. And yes it is needed, many wine country visitors, combined with in/out of shadows and many roads not clearly marked == exciting times for riders.

BTW, there's a decent bike shop in downtown napa.