Thank you for all the replies. With 190 000 miles on the car, I will most likely not go for the 2nd head gasket repair, especially that I will never be able to assure they were done properly. The shop that repaired the first head gasket problem is one of the most reputable shops in town, but they keep denying the problem saying that little bit of bubbling is normal, that there is nothing wrong with the overflow tank getting full, etc. The car is really comfortable and great for camping, but terribly unreliable :-(. Thank you all for the input.