I'd never heard of Textiber until I moved here, and I found them a good replacement for Thomas Mason, which Burgos doesn't stock. In fact, Textiber doesn't seem to be quite so hit or miss as TM, and provides similar value.
Do reply about the puckering when you've time.
PS I am beginning to agree with you about SG's chambray. Though I like the color and hand of the two I have, I'm not certain they are going to hold up terribly...