I've used and owned a few of the 1000-1250lb models in the past. They did OK - meaning just that that they didn't fail - but I never liked the way the big block seemed to sag on the stand. I recently purchased the 2000lb model and like it much much better. I haven't had any issues and feel a lot more confident about having the engine hung on there.
Unfortunately I don't think you'll find too many made in the US anymore. Most all of them are imported it seems.
Here is basically what I have but Summit sold mine at the time:
Jegs 2000 lb engine stand part#555-80042
John