I ended up going with the.....

Advance | Autocraft Gold | 48H6 | 770 CCA | $135.99

They were close by and had the battery in stock. It seems to get decent ratings from consumer reports. From what I can tell, this is yet another private label product from Johnson Controls.

The fit was a perfect drop in for the battery tray and the clamp-n-cables also fit without any problem. No handles on this battery though. Not a big deal but the handles were a nice touch on the OEM battery. Also, no catch can for the vent holes so, like everyone else I just reused the one off the OEM battery. It did come with the red cover for the positive terminal.

Given that this SRT6 never sees extreme cold and lives life between a garage at home and a parking garage at work, I'm thinking any decent quality battery will last a good long time. I can't believe the OEM battery made it 7.5 years!!!