About two years back I got a Deka brand battery from these guys:
$80 bucks and free shipping within USA.
They are a small reseller/retailer with great service & prices.
The Deka is mfg. in USA and seems a very high quality unit.
I bought it on Joel Wiseman's recommendation as the best of the "regular" AGM batteries.
It's been a fine performer so far.
I was not ready to make the jump to the exotic stuff.