I'll chime in to recommend the NS Design double basses. Coming from an electric bass background myself, I was looking for something that offered a DB scale/interface, a unique sound with a DB flavor, a comfortable playing experience, flexibility in tone, ease of maintenance, and a builder that stands behind their product.
I got every one of those things in truckloads with my EU6. With its concentric laminate neck and radical design, it may not be for everyone so you'll want to evaluate it for yourself. I also love the string spacing on the six-string; not purist oriented. The more 'standard' neck design comes in the CR line of basses (which is also more in your price range) if you are so inclined. It's still a different feel from a DB, but you'll have to see what you think.
I could go along with some who have described its sound as having a strong DB flavor in the lower registers that gradually ascends into more slab-like sounds the higher you go. I enjoy that aspect. They have lots of varying sound samples at the
NS Design site.
Here's a nice sample from another TB thread.
On that customer service aspect, I must say that in my experience, NS has gone further than any company I've dealt to provide a great purchasing experience. When I had a couple issues, they went out of their way to listen, diagnose the problem and address it in a timely manner. They really care about your experience as a player.
I too have heard great things about the Azolas' customer service from the player who introduced me to EUB's.
I also can recommend Bass Central --> Great customer service.