I wanted to pull the trigger earlier but was hesitant to buy a mattress without trying. So I went to a local reputable mattress store (Sleep Train in San Diego) to see if they had the same model. They didn't have the exact Simmons Classic Tomahawk model on sale at US-Mattress but had a similar Simmons Classic with the same specs (coil count, plush top not eurotop, etc). I showed them the webpage linked above and they price matched + no tax + 5% off, so I was able to get it for $332 OTD delivered for a queen size.
I'd recommend others do the same at other local retailers.