you have a LOT of choices in a welded boat in the Pac NW. Here are a few:
Almar
North River
Pacific
Motion
Wolf
Raider
Hewes
Fishrite
Harber
Wooldrige
ACB
Silverstreak
Liquid metal
Lifetimer
bridgeview
Eaglecraft
Coldwater
leeshore
armstrong
Maxweld (maxcat)
...the list goes on...
I run an Almar, they build about 60 boats a year, most go to Govt and hardcore users. Most of the builders listed above are semi-custom. Some like harbercraft sell thru a dealer network - those are spec boats essentially where somebody else makes choices. I prefer the have it built YOUR way route - which is one of the great things about alu..if you can imagine and pay for it, they can generally build it.
The east coast set may be all starry eyed with one builder, because that's what is available (and it seems VERY well supported and sold!)..but in the NW, you have some other great choices...explore them. I Have spent considerable time in frnds pacific, so I know what it is like - yes it's a good boat

....
Pollards book on alu boat construction would be a good investment, alu like any mtl system has + and -, you consider them, before you buy...
My $.02, worth what you paid for it.
I have no financial connection to any builder listed above.