As stated by a couple others. The biggest differences in the saws is the level of accuracy and it's ability to cut through thicker materials. The table saw is the second largest purchase in my shop (dust collection system is #1). Of all the tools in the shop this is the real workhorse that can serve many functions. Buy as much saw as you can afford. Keep in mind that there are some constants: 1. The table saw will never be big enough (just when you think a 30" saw is all you need, you need the 52"). 2. The blade that comes with your saw is garbage, get a good quality blade (normally in the +$100 range). 3. The quality of the fence is the second most important aspect of the saw (truing up the table to the blade is #1). 4. Do not attempt to put the saw together and true it up yourself, it takes at least two people preferably three. I am sure others can add to this list.
Hybrid saws are ok, but they tend to bog down on thicker flat work or burn edges if woods is forced to quickly. If you do not have or intend to get 220V receptacles, it may be your only option. The Jet XACTA is not a bad saw, but is a little under powered for my purposes (I make a living at flat work). The Grizzly saw you mentioned is not going to have the level of accuracy that more expensive cabinet saws will have.
I have never had buyers remorse from buying too much tool or greater quality, however, I have had buyers remorse from buying not enough tool and wishing I had splurged for the one of higher quality and more accuracy.