Hi David!
I have worn, printed and sold Vapor Apparel for about a year now - and swear by it.
I'm actually country distributor for this range and have in-house dye-sub service. So, as far as quality and performance goes - I personally believe it is worth the commitment.
When it comes to comfort - my whole family is wearing Vapor shirts every day - including as sleepwear and undergarments. They do keep you cool when it's hot and warmer when it's chilly. They are bacteria and stain resistant (even oil and tomato sauce will wash off eventually), they dry in 15 min and don't need ironing. That makes me happy as a mum of 2.
I have supplied several triathlon and adventure reces and had the best feedback and repeat orders.
Big part of my orders for custom decorated casual T-shirts come from Queensland - Auzzie equivalent of California. I wish I had a designer on board though - I can just see the interest absolutely soaring! So far I've been mainly printing customer-requested graphics
The shirts sublimate really well - I'm using Epson 4000 with Artanium UV+ inks and very happy with the results.
Another big advantage of Vapor Apparel's is a variety of colours - so far "dye-subbers" were limited to white. To start with, I was a bit concearned while printing on blue, pink and yellow... Have a look at my swatches - I think they speak for themselves!
You nearest distributor will be Johnson Plastics - you can get a sample pack of assorted styles from them.
http://www.vaporapparel.com/sub_pages/johnson_plastics.htm
http://www.johnsonplastics.biz/CGI-BIN/LANSAWEB?WEBEVENT+L0B098B9058810000889D05G+M37+ENG
Best regards,
Let me know if you need any more info or pictures - I'll PM it to you.