Funnily enough, i used the Armstrong SB replicas - though its Aaron who's in the UK, not daddy Kent who's U.S. based.
Being an SB user, i can tell you they sound awesome. I had a pair because i have the 900 twin pup.
I did try Rautia but he wouldnt deal with TransferWise for payment, so would have had to use Paypal at around 10 times the fees. Also, he quoted me about 3 months wait time. I got mine from Aaron in a little over a week