Just word of mouth, there is a ton of pcb fabs. I can't decide.
I've a 10 layer, controlled impedance, very dense board (min trace 4mil, min hole 10mil)
I prefer 3313MS FR408HR prepregs and cores.
well that design is on the edge of a medium tech fab capacity. you can request a quotation from www.pcbway.com/. They offer a pretty decent quality board. if they can fab it, it could be a cheap choice. and do not trust their auto quote system as that thing is not quite accurate
5-6 WD build time and 3-7 shipping time? That is ages. Chinese manufacturers are not in the same league when it comes to prototypes. EC can build a PCB in 2 days and I get it next day.
You send the design 18:00, someone processes it india in the morning someone starts producing it.
In the meantime you order components from Farnell on day 2 evening.
You spend the third day ordering the assembly service.
You get the components on day 3, you get PCB on day 3. Both of them shipped out on day 3 to the assembly house.
Day 4 assembly is started, in the meantime you spend the day drinking coffee and posting on eevblog.
Day 5 you get the assembled prototype.
Whoever orders from EC or Würth, is not going to order prototype from China. Time is money.