The stock 0.5mH coil used in the two π tower sounds great to me with the Stoetkit amp, the Nelson Audio SE8 and the Audio Note Kit 2. Of those, the Audio Note and the Nelson Audio are SET amps. On the other end of the spectrum, I think the two π tower also sounds good with solid state receivers and home theater systems. Output circuit resistance is probably a little less an issue with solid state, until the resistance becomes pretty large, like half the value of the voice coil or so.

I ran Paramours using stock output transformer and Solen parafeed cap, so I kinds of know what you're describing here. I used Valve Art and Electro-Harmionix tubes in my amps. I think I'd have to agree with you that slightly lower Q speakers tended to sound better with Paramours, and reducing DC resistance tends to push the system in that direction. Swapping the coil is an easy mod, and I'll bet it sounds good. Might also be worthwhile experimenting with replacing output transformers and maybe changing parafeed caps to see how that sounds too.