Mike, I don't mean to rip your post apart, but:
I agree with some of the others that Iwaki and Blueline pumps are tremendous for lifting applications. Tried and true. So are the other Reeflo's (snapper, dart, hammerhead, barracuda, etc). A bluline 70, or an Iwaki 70 are probably the right size pumps for your application.
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So the question really is, do you want the old tried-and-true shaft-coupled pump that's well known in the hobby
Iwaki and Blueline pumps are magnetic drive as well, fwiw. Personally I don't think I'd consider shaft vs. magnetic drive as important if high head is the requirement in question, as drive style doesn't really alter the flow curve in that way. I agree the blowhole pumps are new in this hobby, but they're essentially rebranded industrial circulation pump technology with decades of history so I wouldn't personally worry about it.
You mentioned some of the conventional reeflo pumps - some of those would or would not be appropriate in this application. The OP mentioned the snapper dart hybrid - personally, I would not use that pump in this application.
Generally, larger pumps in this hobby come in two flavors, from a functionality perspective. On the one hand, you have pumps with big plumbing diameters, slow motor speeds, and relatively large impellers. These pumps are typically very high flow but low pressure. The reeflo dart/snapper hybrid is a perfect example of this style.
On the other hand, you have pumps with small impellers that are spun very fast and use small diameter plumbing. These pumps typically have very high pressure but only modest flow. The reeflow blowhole models are more or less this style though there are more extreme examples (i.e. the high pressure models from Iwaki/blueline).
The good news is, it's easy to tell the difference by looking at the pump specs. What you want for a basement sump is a pump with a very high max head, i.e. the point at which there is no more flow. A Reeflo Snapper/Dart would PROBABLY be able to pump up 13 feet of head but there would be very little flow. An Iwaki MD70RLT is rated at a lower flow, but it can keep pumping above 30 feet of head.
The Iwaki lineup is a perfect illustration of the difference. They make "normal" models (with an x in the name) and high pressure models (no x) with the same overall power consumption, for instance the MD40RLT and the MD40RLXT. Here's the performance curve, which makes the difference obvious:
If you can afford them, the Iwaki pumps are awesome. If you want something a little cheaper, the gen-x pumps get close but are much cheaper. It really comes down to deciding how much flow you want through the sump, then looking up pressure-biased pumps that are able to produce that much flow at your given total head.
