FWIW Billi I was involved in a test of an autox prepped S2k (2004) and ND1 (2016?) last weekend. The S2k accelerated harder in VTEC, but below VTEC the MX-5 was faster to accelerate. The weight difference meant the MX-5 was also quicker to transition. They're not slow. On the same size wheels/tires (245s on 9s) the ND was noticeably faster on this course. The S2k needed wider wheels and tires to compete.
I'd still take the S2k though. Jumping back and forth between the two, it was very apparent how little weight and feel the MX-5 driving controls had.
A new S2000 would sure be nice, especially if kept NA and light weight.