Thanks for all the kind words! It means a lot, this was a ton of hard work and I'm personally really happy with how it came out, and I can't wait to use it on my own productions.
As for IR loading - there's been a lot of requests for it, and there's no reason why the speaker dynamics algorithm can't be profiled to match external IRs actually. This and a lot of other "low hanging fruit" types of feature requests are all on the consideration list still for future releases, but they took much lower priority than the Speaker Dynamics feature. Recabinet 4 is still in the works, but I wanted to make sure that everyone gets a lot of mileage and value for their money out of version 3 first. How many of these kinds of features make their way into v3 or v4 instead is up in the air, but obviously the UI of the plugin has to change significantly before a bunch of "utility" type features can be added.
On another note - I've seen the Two Notes plugin's "Overload" knob, and I've noticed a similar feature in the Axe FX. Seemingly, these are meant to simulate speakers that are either damaged or on the edge of damage. This is fun and interesting, but the goal of Recabinet's Speaker Dynamics feature is to simulate speakers behaving under "normal" conditions, doing what their manufacturers intended.
love you 
