Cartridge recomendation for Garard 301 and Ikeda IT-345CRI

Leaning pretty hard towards the Miyajima's.

That's right. Been waiting for a long time to catch unused Kansui for the right price in Denmark. 

Shilabe can sound a little dark depending system. I have setup several. They are not hard to get sounding decent and are quite good overall.

Do you think the Ikeda is lively enough for the Shilabe?

Ikeda is perfect for low compliance cartridges (any of them if the compliance is very low) 

I'm sure any Myajimi (or Ikeda , SPU's and Miyabbes etc..)  sound marvelous on the Ikeda....I guess I'm struggling with the "Japenese" warm and rich sounding cartridges are sympatico with the majority of music I listen to. Here's a quote from a review of a Myajami:
"Wonderful tonality, dense background, palpable foreground—long story short, a classic example of a rich Japanese sound. I also realized quickly that it wasn't a "perfect sound" as the top Dynavector model, DRT-XV1t, delivered a better performance proving that there was much more information written in album's grooves, it delivered more distinct, more "live-like" sound. And yet Shilabe was (and still is) a remarkable proposal for those, who value a rich, warm sound."
Does this presentation offer long term satisfaction over time with the following music:
Grateful Dead, Little Feat, Stones and lots of Classic Rock, Motown, and early Funk. All kinds of Jazz; small club, "big and bold" jazz, modern and vintage.

Would a sharper leading edge provide more excitement over the long run?

I also listen to a steady diet of various Americana and Acoustic... which I'm sure the Rich Japanese sound would be sublime.