Why would 16GB ram cost that much if it already is offered for about 85% less? Is not like your buying 2. There is already one there, so another adding one more wouldn't cost over 1008GB was the sweet spot 5 years ago. It should suffice but real soon games will recommend more RAM for better gameplay/performance. I think spending 75$ extra now is better than spending $120 more in the future when you may want to upgrade.
As for the SSD I would go for the western Digital one. It will still get you really fast load/boot times. I'm not saying the Samsung is not worth it. It's just better to cut costs there and put it towards the RAM.
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Having 16GB ram, and the SSD makes it add up to $1119.
Reminder, i still have no OS installed.