I like the McLaren MP4/12. Can't beat an F1 V10 engine sound. I still get goosebumps when I watch old F1 videos from the late 90s and early 2000s.
The V10 do sound great, except the TC or overrev sound... Otherwise, for the McClaren GT3 and Porsche GTE, Chevy V8 P1, are the bests for me.
I thought mods were only able to use the default built-in sound, didn't know they were able to bring their own mod sounds..
Off the top of my head I‘d say the Corvette C3-R sound is my favourite. I do also like the M8 GTE, it sounds like a mean machine. Ofc the F-V10 does have a special place in my heart, I don‘t think it needs an extra mention, it just sounds phenomenal.