Certainly the old Delta Unisaws are well established work horses in the woodworking industry. (Rockwell was the same company)
Powermatic is one of my favorite brands as a professional woodworker.
Laguna Tools are well built also, and tend to come in at slightly less cost than the other two brands.
You may also want to consider other features... such as a sliding table, or combination machine (table saw / shaper for example). To purchase a good 'workhorse' of a table saw, you can expect to spend $3k or more. For a little more than that, you can get a combination machine, something to consider if floor space is limited in your shop.
You may want to check into used machines too... there are always some up for auction. I'd look at auction companies that specialize in woodworking machinery, not just ebay.
'Floor Demo' models can be a good purchase too.
And think about a feeder motor with 4 rollers...those are very handy, not only on the shaper, but the table saw too, for production work. (Just have to remove one or two of the wheels to clear the sawblade, depending on the model)
Have Fun