Good! how about a modern bridgeboard?
A bridgeboard is not a possible idea I'm afraid - you'd need a 1GHz minimum CPU to be of use, and a fast PCI bus to run anything at all usefully, and an A1200 just doesn't have anywhere near the right electronics for that kind of thing. You'd end up with it the other way round - the PC would be using the A1200 as a dongle.
I'm not sure what that's got to do with the AmigaKit DSP card anyway...?