I've driven both the R and SC and actually made an offer on a SC ( 1k under what the dealer wanted ) but wasn't excepted. These were both on my short list ..... and I came to the conclusion that it was just to hardcore for me as a weekend /sunny day car ! It rattle like mad , rock hard suspension and even the sc didn't feel that fast ! The build quality was horrendous on them and i just couldn't live with the fibreglass and worries of damage /repairs .
I know you've had an s2k before but might be worth a look at again . Going up in value , cheap to run, with a few mods can be a little