After watching the battery testing done by Project Farm, I would buy my next car battery from Walmart or my nearby Farm & Fleet store. Walmart EverStart Maxx performed extremely well in the test. I see zero reason to pay extra for a battery with a more known brand name sticker slapped on it. Paying extra elsewhere would be a waste of money. Farm & Fleet batteries come with a better warranty & they are priced right, too.
Walmart Group 35 options -
EverStart Value (490 CCA) = $69.74
EverStart Plus (525 CCA) = $109.76
EverStart Maxx (640 CCA) = $139.84
Farm & Fleet Group 35 options -
Gold Series (550 CCA) = $117.99
(6 year warranty/2 year free replacement)
Platinum Series (640 CCA) = $134.99
(7 year warranty/3 year free replacement/3 year emergency jump start)
A Mirage engine is easy to turn over. I haven't had any problems with the wimpy 356 CCA factory battery that is over 6 years old. If my battery died today, I would give the $69.74 Walmart battery a try. If I get 5+ years from it, I would be happy. If not, I will try one of the better ones.
I used to buy auto batteries from Auto Zone, but their prices have become nuts. They can keep their batteries!
I wouldn't pay extra for AGM car battery, because I haven't seen any indications they are superior in a car application, but I would put a AGM battery in my ATVs & UTVs because of the terrain they go over.