My Jeff Rowland model 8 with choke power supply still makes me smile after all these years. I recently did a AB with a 501 and IMHO my 8 was just in a different league. Far more resolving and with a much better control of the bass. The 8 also threw a far deaper soundstage and was much sweeter in the highs.
The only problem you will find is finding someone with a choke supply 8 for sale.
The only problem you will find is finding someone with a choke supply 8 for sale.