I have no idea whether the 8811 without use of JP1 supports a Pioneer HTD-510DV completely, partially, or not at all.

With JP1 you can create an upgrade, if necessary, to support almost any device. I'm sure you can support your receiver.

If it's a common receiver (or shares the command set with a common model) and support isn't built in to the 8811, then someone has probably done the work already and put a file in the JP1 group's devices folder. (I haven't checked).

The 8811 is a great remote. It has a lot of buttons (which may be important if "all in one receiver" implies a lot of different functions). Some people prefer a physically smaller remote (though a smaller remote with comparable features is hard to find). Others want an LCD. Other than those two factors, I don't think you can find another remote as good as the 8811. (I still prefer the urc7800, but they're getting hard to find and they need the JP1 connector soldered).