I just got a sample Fu Ding Bai Hao Yin Zhen from Jing Tea Shop. I haven't tasted it and even if I had it wouldn't mean much since I don't know my way around white tea, but Jing usually has very good stuff at reasonable prices. They say they aren't carrying their usual Yin Zhen because "Weather hasn't been kind in the Zheng He county."
I just got an order from them and a white sample was in it. Since I didn't know the Chinese names I just through it in the cabinet. Your post reminded me and I went to see if it was a sample of silver needle. Well, it wasn't it was the other one they offer, bai mu dan. I have only tried the roasted TGY I got from them. It is my first time trying that type so I don't have anything to measure against but I like it.
Of those the top two that come to mind are Seven Cups and Swan Sisters. They're both exceptional teas, and both about the same price as each other. ~$10.00 / oz.
I have been interested in placing an order with Seven Cups. They don't offer a ton of sample options and that is the stage I am in but I think the recomendation of their Bai Hao may push me to place that order.
For now I'm sticking with Adagio for whites; I've been happy with everything I've ordered so far. Maybe when the spring crops are out I'll try samples from TeaSpring or Seven Cups.
The only whites I have tried are from Adagio. I really like the silver needle but don't have anything to measure it against. In fact I enjoy most of what I get from them. Maybe I too will wait for the new harvest to try someone new. Anything at this point is nearly a year old right?