Alternator replaced. Battery is in sound condition. Going to swap current battery to project car. New battery pending. Just because. What battery for the 1990 Q45 is desirable. Cheapest, mid range, high end. Opinions please!

There are few group 27 options (OE size). I personally like AGM batteries. Both my G50s have the Northstar 27 AGM. Pricey. Brutal power.

Yep, Group 27 fits just fine - which is bigger than OE for my model year.

If money were not a consideration, I'd install an Odyssey AGM - They are superb.

The practical side of me says "get a 60 month Wal-Mart" - They're decent quality, and getting warranty service is easy.

The best battery I've ever had for the Q45 was from Costco. Under $100, and a 3 year replacement warranty. That said, I think the Walmart Everstart AGM batteries are a great value. I think $120, in either 27 or 34 would fit, I believe. The two are fairly close in dimension and CCA, polarity is the same. They also have a value brand battery for like $60-70, but not AGM. For the money, you can't go wrong. The Everstart has a good warranty- 3 year replacement.

Went with an Optima red top. 224.99 list price. Coupon + 10% courtesy + 10% member discount + old core 156.68 w/ extended 5 year warranty out the door.