Triple screens and a buttkicker will definitely increase the immersion, but i don't know if just on wheels and pedals alone it would be worth investing 5 times the money. I doubt it will be that much better compared to like say a CSR or a T300 to justify the huge price difference.
On pedals - I have DFGT pedals, Fanatec standards, CSP V1, and CST Performance pedals, and the prices pretty much align with the experience quality.
On wheels - you're still in the compromise zone with your CSR. At that level, the CSR, Porsche GT2/GT3, and G25/27, all have their notable strengths and weaknesses, and priorities make the difference in choosing. It's great, because if there's a very high priority, a buyer can scratch a certain itch without paying a premium for it. I talk of things like low drag levels with the G27, belt drive with the Fanatecs, or a real feeling rim with the Porsche wheels.
At the high level (ranging maybe from the Fanatec V2 to the Bodnar), features on each wheel are more to scale with each other, and (as with pedals) it comes down to price aligning with experience level for the most part.
I'd see the best value for categories as.....
Mid range - T300 + CSP V3 pedals
Upper Mid - T300 + PT-1 pedals
High - Accuforce + HPP pedals
Arguable then that the T300 could be added to the list of wheels that are in the "to scale" area.
Anyway, I have no doubt that you would be blown away if you grabbed a set of the new Fanatec pedals.