the table saw is the one essential tool in most shops. Precision and power are important considerations. I went from a 1hp Delta saw much like the Porter Cable you have. I don't have 220 available at this time, so that was a consideration when I outgrew the saw. It was just not up to working with precision and lacked the power for thick hard woods. It was always bogged down, stalling, or blowing the breaker.
If you have $600 available, and you sell this saw for $300 or so, you will be well on your way to a hybrid saw. I chose the Laguna hybrid, which has a 1.5 hp motor on 110, and about double that if you switch it over to 220. I has an American made motor, a very nice fence, a large and very flat cast iron table and you can get it in either a 36 inch or a 50 inch capacity. I got the 36inch because my shop space was limited. When you assemble the saw, take a look underneath at the very heavy weight trunions, which is what the tilt moves on. You can see how beefy they are. I ordered mine through Rockler, and setup was surprisingly easy if you follow their video directions. Rockler has the occasional sale with 10% off Laguna tools.
One of the cast iron wings was not flat when it arrived, and because Laguna's HQ/warehouse was so close I called and they said, come down and bring the saw. When I arrived, they gave me a new saw, set up perfectly and incredibly flat as tested by a machined stainless steel straight edge. I learne that although built in Taiwan, the factory must allow the cast iron to "rest" for 6 months to reduce stress before it is machined.
My feeling about tools is that I expect them to last for decades, and cheaper tools just won't do that. So to me if I have to save a bit, or use credit, getting a really fine tool is always the best bet. Buy in haste, regret at leisure holds true. You will soon forget the extra cost, but you will enjoy using a really good tool for a very long time. I bought most of my tools during my highest earning years, so I didn't have to use credit, but I think using credit to move up a notch to a better saw is worth it.
While I think the Bosch 4100 saw is a pretty good machine, I think that as you do more woodworking, you will be far happier with a top notch saw. There are other brands out there, but I can only vouch for the Laguna. My experience with the Delta (which was bought by Porter Cable), vs the Laguna convinced me that indeed, you get what you pay for. The Laguna saw is the one essential tool I just wouldn't live without.
BTW, I looked at half a dozen other saws from about $700 up to $2300, so I know what you're going through.