I would go with SVS. They are always good, always a good value, and they have a good warranty and good customer service.
Now, if you want to search for professional reviews in which the subwoofers are actually measured, go ahead. It is possible that you will find one is a better performer than the comparably priced SVS. But it would have to be much better to be worth giving up the good warranty and good customer service. And I don't think you will find one much better at comparable prices.
As for ported versus sealed, I would go with ported in most cases. If you had an infinite budget and room for a couple dozen subwoofers, then it might be better to go sealed, because below the tuning point, a sealed subwoofer will generally drop off slower than a comparable ported subwoofer. Generally, above the tuning point, the ported subwoofer will be capable of higher volumes than a comparable sealed subwoofer. You can see this by comparing graphs of frequency response at SVS. You can even look at one graph for their models that have variable tuning and allow for a sealed option.
So, I would go for the best ported subwoofer I could get from SVS. If you want to save a bit of money, go for the cylinder version instead of the box version. The cylinder version will be lighter due to the fact that a curved surface is inherently stronger than a flat surface, so for the same strength it can be thinner and lighter. The shape is also easier to grab onto, so they are much easier to move. The cylinder versions also take up less floor space, though they are taller than the box versions.