Whew! Welcome to the wonderful world of bike-shopping! It's a good thing that you are able to get out and see and test-ride so many bikes, but it does become a bit overwhelming, huh?
I won't comment on the pros/cons of specific bikes. At that price range you mosty want to focus on good fit and, yes, good customer service. The third important factor will be how the bike "feels" to you and how much you like the bike (cosmetics)
I think you really need to clarify (in your own mind) whether you want a comfort mountain bike or a hybrid, that will help you narrow your selection. Generally I will sell the mtb to someone who says they might go off road on easy trails. If a customer says that she will only ride on pavement and perhaps has a goal (century ride?) in the future I usually lead her toward the hybrid.
Yes bike shops can order bikes. Also, you didn't mention whether you got to try one of Trek's hybrids (the 7100 or 7200).There I tried the Trek Navigator 100 and 200, which seemed okay (grip shifts, though) and the guy who helped me (the owner) seemed really knowledgable and helpful. They also carried Specialized, but not the hybrids. I didn't ask if they could order one -- this might be a possibility.
Uhm, close but no cigar. Giant is a HUGE Chinese company and they own/control a huge amount of the bicycling manufactuing overseas. Many US bike companies will use Giant facilites to produce their parts and frames, but they are still "their" parts built to their specs. And of course almost everybody buys from Shimano.The guy at the shop (a teenager) said they are a better bike for the money than Trek because they use their own parts, whereas Trek buys parts from Giant and thus charges more.
Cannondale will be the one bike in this price range with a frame that is made in the USA. For some people this is important.I also tried the Cannondale Adventure series at the shop with the poor service, but they were more expensive for what seemed like the same bike to me.
Hope this helped, good luck in the search. Try not to over-think it too much...riding season is here and the most important thing is to get out and ride your bike![]()