There are three ways you can go to get a high-quality AK.
1. Buy an Arsenal or Krebs gun. Both are superbly made and modified, set up as a quality rifle should be - but you'll pay for it. As mentioned above, if you can find one used at a great price, jump on it: but those I've seen for sale are seldom at a great price...
2. Buy a VEPR. These are not fully-standard AK's, despite being built on an RPK receiver. They are, nevertheless, very high quality, and are 90% AK. I have one, and like it very much.
3. Buy a Saiga carbine and have it converted to full AK configuration. The Saiga is essentially a "de-militarized" AKM, made in Russia on the same equipment used for military rifles, so it's a very high-quality "base gun". Conversions are done by a number of companies, and can range from a fairly low-cost "cosmetic" conversion right up to many hundreds of dollars for a custom-featured gun. Your money, your choice. I'm doing this right now to two Saiga's, and got plenty of good advice from fellow members of THR - see
this thread for the discussion, and the eventual configuration.