what racing ign do you recommend?

Robert,
You raise a very interesting point. Advertising a coil that produces 50 or 60 thousand volts sure sells lots of coils! What the ad fails to tell you is that the coil will in a NA engine will never need to produce that much voltage. The ign system produces enough voltage [ & no more ] to ionise the plug gap, probably 10-20kv on average.
A very important feature of the coil is the purity of the steel core, which consists of thin pieces of stee [ laminated ]l, usually welded together. This purity becomes important at higher rpms where there is less time for the core to magnetise/de-magnetise. A good quality core with high quality steel & the correct alloying elements can go to higher rpms before misfire.
D. Vizard did some coil testing & found a stock HEI coil started to misfire at 4800 rpm. A MSD & ACCEL coil both ran to over 6000 rpm. The spark testing was done into a chamber that used compressed nitrogen @ 142 psi. DV noted that this is a severe test, & sparks were dropping sooner by about 25-30% compared to a running engine.

As for the coils in the cheap Chinese dists, I have no technical info on them but have used a great many of them & never had a problem with coil or module.