Congrats on taking the time to research before you buy!
I looked at MANY tables before choosing the
Golden Ratio "Mike's Light" table. It's perfectly suited for the type of work I prefer to do, lightweight, and very durable. My table came with headrest, bolster, and case for around $600. It has a working weight capacity of around 500 lbs and is VERY easy to set up, take down, and change table height (especially handy at continuing ed seminars!). I chose a semi-firm table because I can add extra padding when desired, and sometimes a firmer surface is preferable.
People have different feelings about metal vs wood tables. Wood is heavier but may be sturdier. My table is metal but very sturdy with no wobble. I've seen other metal tables get wobbly after only a year of use, and only chose the one I have after verifying its performance with several MTs that had used the same table for 5+ years. Lighter metal is easier to carry, but buying a table cart negates that issue.
I really like the Golden Ratio and Oakworks face rests. Very comfy when adjusted properly. Some other brands less so, and I recommend getting on a table to feel it before you buy.
Unless you are trained to do Shiatsu and Reiki, the cables and end plates don't really matter. I originally wanted one with all the options too, but realized that it would be years before I had all training I would need in order for those options to matter. If I eventually need a table with those options, I will buy a new one - and write it off as a business expense.
I feel that 32" seems to be the best all-around width. I prefer 32" because larger people are more comfy on it, and I'm tall enough to reach across if necessary. Lots of my clients would be hanging off either side if my table was narrower. On the other hand, I'd get a narrower table if I was short, like under 5'4" or so. You can get arm rests to accommodate larger clients on narrow tables. Also, with a 32" table you can use standard twin bed sheets if you run out of fitted table sheets.
No one will ever care whether your table has rounded or square corners. Rounded corners are supposedly less prone to wear, but from what I've seen it's only an issue if you cart your table around a lot and don't have a a case. If you use a table case and/or your table pretty much stays in one place, you won't notice a difference. The square corners also make it easier to use twin bed sheets if you are so inclined.
I have yet to find a new massage table for under $350 that I would want to own.