Made in USA

I have mainly US.

Wilson, Pass, Thiel, VPI, Graham Engineering, Manley, McIntosh, Mark Levinson, Sunfire, Rane, Cardas, and Tice for US.

Koetsu, Nakamichi, SAE, and Sony for Japan.

Bryston for Canada.

Oppo, Red Rose Music, REL, Carver, and AudioQuest for China.

Proac for UK.

Dynaudio for Denmark.

Mostly EU, Canada US in my kit. Only China is from the China I respect Taiwan. 
 

VAC, Backert Labs are two I can think of at the moment.

I would start with Audio Research, Pass, Magico, Conrad Johnson, VAC (as @tomcy6 mentioned). Boulder, Wilson… many of the most respected high end names are American. 

I have to throw in Sonus Faber (Italy) and Koetsu (Japan). Dcs and Linn… the UK.

If you are putting together a cost effective  high end system… you do not have to pay more… you are going to be buying primarily American, you do not have to pay more.
 

I try to buy US made.   Amp, Preamp, Speakers, Turntable,  made in USA.   DAC , Greece, Tuner #1 Canada,  Tuner #2 USA,  Streamer, S Korea.   

Country of Origin has less to do with it than getting  the best for the money, but generally speaking I avoid Made in China whenever possible.  Blu-ray and Vault 2 are made in China but they are decent products but not on the same level as other gear in the system.