One of my favorite pro-sumer level audio recorders is the Zoom F4 (affiliate link to B&H which helps support my reviews). It was a very good value when it was priced at $650 USD, but now it looks like it is (at least temporarily) priced at $500 USD over at B&H Photo. If you've been on the fence, now may be a good time to jump in.
Here's my most recent comparison episode which includes the Zoom F4:
And here's my original review of the Zoom F4: