Both of these speakers measure quite well. It will ultimately depend on your room. I have heard the Kanta 2's on several occasions in well set up rooms and have never thought they sound bright or harsh. I think they could in a bright sounding room. The KEF's that i've heard have never...
Audioholics reviewed both speakers and preferred the Polks.
https://www.audioholics.com/bookshelf-speaker-reviews/polk-l200-l400/conclusion
https://www.audioholics.com/tower-speaker-reviews/klipsch-rp-8000f-ii/conclusion
The LS aluminum block and T56 6 speed transmission weighs 30 lbs more than the stock 6 cylinder/ 4 speed transmission in my Z. With a little tweaking can make 4 times the hp and is completely reliable and daily drivable. Mine dyno’d at 396 hp at the wheels. They truly are great engines.
I live 20 minutes from the Dragon. So many great roads here in Tennessee. I take my MINI up there often but I really want to take my LS1 swapped 260Z...It'll happen this year.