Why are you even considering a 14 SEER unit? Get something more-efficient. And I don't recommend Goodman. I have a couple friends in the HVAC business and while they will install a Goodman unit for people who insist on them, reason of price usually, it's 'penny-wise, pound-foolish' to choose Goodman. When the Goodman unit has something fail, you still have to pay labor even if the part is free. And, Goodman parts are more-prone to failure. That's two different master license-holders for HVAC speaking, not a weekend warrior.
RHEEM or RUUD are what are the AC contractors recommend for most customers. I've had installed two whole-house AC's in the last few years and chose Bryant for the compressor and Carrier for the air handler (Bryant and Lennox for the other), SEER of 19.5. More-expensive but the difference in the electric bill was dramatic. August prior to the changeout was $285, August post-changeout was $130! That's one house. The other house, we added two additions, so you really can't compare before/after, but the bill was still lower than the 'before' bill in the second home, even with the square footage additions!
I just spoke with the HVAC master license holder who has done my work about getting a mini-split for the garage, 2 car, w/a loft. He's recommending a Mitsubishi, he said Fujitsu is very efficient, but not many people carry them. I'm meeting him next week at the house to get a bid on the garage install. We just did a big re-model including the garage configuration, and the garage is already wired for the 220 v mini-split.
http://www.rheem.com/
https://www.ruud.com/products/hvac/
http://www.bryant.com/bryant/en/us/
http://www.carrier.com/residential/en/us/
http://www.fujitsugeneral.com/us/residential/index.html
http://www.mitsubishicomfort.com/products