Hi Kerri,
I think that both of your choices would be good ones and would provide great value and quality for their respective price range. I am familiar with both manufacturers and think highly of both of them.
You will find some comments about the Amazon product (made by Brooklyn Bedding) in post #2 here. This would be a good choice in a “budget” latex mattress and should certainly last much more than a couple of years. Because it has 3" of soft latex and 1.5" of soft polyfoam on top … this would not be a suitable mattress to add toppers down the road. Toppers can help make a firm mattress softer but a mattress that is or becomes too soft is very difficult to make firmer and too much “soft stuff” on top creates potential alignment and back issues.
Assuming you are talking about mattresses.net with your all latex option, they are manufacturer members of this site which means that I consider them to be among the best manufacturers in North America in terms of quality, value, and service. They also have a lower priced blended talalay option than the all natural talalay you were looking at. If you do choose to make a purchase there … make sure you let them know you are a member here as you are entitled to a 5% discount with any mattress purchase at any of our members.
Phoenix