I've ran SMR converters for 25 years street/strip with good results. He has a good 3000 and 4000.
I currently run a 5000 ctc I bought used and freshened locally sine june last year if I get my 572 plus I'll put my 4000 smr back in.
PTC Dynamic are good too!
I always wanted to try a Dynamic some freinds have them with good results as with the PTC's too