Cool car! Sounds like you came out ahead!
I like the color. Will reflect heat well in summer, and won't show dirt and scratches. When I was looking for my Tacoma, that color was my first choice. A local dealership had one, but we could never get together in price, so I ended up going with a black one at a dealer about 60 miles away. Looks good, but tough to keep clean.
I like the M/T. I wouldn't have an auto in any car smaller than full-size. The 4-bangers just don't have the oomph to run a slushbox.
I talked to a guy who has one, and had the HG problem. The previous owner had replaced the HGs without removing the engine from the car. The repair was unsuccessful, as he likely did not properly torque the head bolts, in the correct sequence, which, I understand, is critically important.
He removed the engine and performed the HG revision properly, and has had no problems since. Said R/R of engine was a snap, and the HG R/R was easy with the engine out.
As far as batteries, I have a lot of experience on that front, as I have R/R'd hundreds when I worked for Auto Zone while I was in A&P school. Battery cable corrosion is an annoying problem that can be easily prevented. All you have to do is apply a liberal coating of a dielectric grease compound (composed of petroleum jelly with silicone thickeners) to the cable clamps after they've been tightened. That will prevent any spilled acid from coming into contact with the steel clamps. Also, regular under-hood inspections will catch any electrolyte that has spilled and run down the side of the batt. That should be cleaned up immediately with a solution of Arm & Hammer and water, which will neutralize the acid and prevent corrosion to the frame or other metal parts.
As far as sealed, AGM batteries, the Optima is good, but usually over-priced. If I bought one, I'd go with a Yellow Top, as it's a true dual-purpose batt.(has deep-cycling capability). They're pricier, but worth it.
IMHO, the best batt. on the market is the Odyssey. It's an AGM, but uses a traditional, vertical-plate cell design instead of the spiral-cell design of the Optima, which results in wasted space. Also, the Odyssey uses 100% pure virgin lead in the plates (it's better, trust me
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All that said, the Sears DieHard Platinum is a re-badged Odyssey that you can buy for $219.99. Occasionally they go on sale. If I'm not mistaken, that Forester, and most Subies, take a 35 series batt., which is available in a DieHard Platinum. I wish they made them in a 34R for my truck (although the 35 has more juice than my current, standard wet-cell unit).
Funny about the lesbo stereotype. I wasn't aware of that one, although I did know that Subarus, along with Volvo and especially VW, are considered hippie cars. When I've been to Bohemian, hippie towns like Boone, NC, Madison, WI, etc, all I've seen is VWs and Subies. Funny, in Boone (nice town, BTW), the largest auto dealership is a VW/Subaru store.