At one time Lincoln floor jacks and A/C jack stands (which ESCO is a copy of ) used to be a high quality set up. But I think both Lincoln and A/C stopped or withdrew due to insurance (some may say cheaper competition).
For a while Arcan 3-ton Chinese made floor jacks at Costco for $100 was a great buy and a very heavy good jack, but haven't seem them in stock in recent years.
Brunnhoelzl jacks are one of the best aluminum jacks
http://www.brunnhoelzl.com/pro_flat_jacks.html
I dont like anything other then 3000pound capacity
https://pitstopusa.com/i-5067382-all...cing-jack.html. - because even when you have the car on jack stands you can add the floor jack as an extra precaution to take weight off the stands.
And this
http://www.acjacks.com
I personally would not get under a car using any Harbor Freight branded jack or stand.