If you watched my hand held meter testing, you know I took the home made shell case probes a little over 4KV before switching to my Tektronix P6013 probe. I am pleased with the results from the home made probes.
The P6013 is rated to 12KV and I ran it a little over 13KV when testing the Fluke 101 and 87V. This is the highest voltage probe I have at home. If I had the cash, I would pick up a Northstar but I think we paid around $3 for that last one. They are top quality products.
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My plan is to attempt to construct a new probe for home use, similar to the shell case probes.
Looking at DC - 50MHz, 40KVDC/80KV (pulse at 50% duty) min with a max load of 200uA, 1000X, uses 1M input on DSO. I plan to stay with standard coax with no compensation at the DSO. With 80KV on the high end at 50% duty cycle, the life of the film resistors should be fairly long.
The video shows the end result of attempting to make my own 2KV 100MHz probes. The attached picture shows them next to a few other home made probes to give you an idea on their size.