There are many really nice tires out there, so get ready for many comments.
I like what both of the above responses gave you. I just purchased Panaracer Gravelking's SK myself and am impressed. But I have also owned Continentals, and just bought my son a nice pair of mountain bike Conti's. Can't go wrong with that brand.
Best price I had found for the Panaracer 700x43c (actually measures for me to 700xnearly42c) can be found here:
Ebay Panaracer 2Pack for $74
FYI: If you are going to purchase one of the more affordable priced tires, you should jump on it soon. Like everything else in the bike industry, inventory is low and prices will be going up substantially soon.