1/25 has 2 events going on. NCRC track event at Sears Point & an Autozotica thing is scheduled that day as well. Not that you can't have a Comptech tour that day, but attendance might be slim.
For me personally, 1/18 is definitely out of the question as my son's First Birthday is the 18th, and I will be occupied with him and all the relatives.
For me, that leaves 1/11 as the best date, but don't make your plans based on what is good for me as my schedule is such I can't guarantee I won't be working that weekend.
Fritz