Ditto, I'm a member of the 230 Lbs club and have used a RX8 in a 175cm; it's not a noodle!
I am 6 foot and 230-240. With gear and a pack you are talking 260-270. I love the RX8s. I ski them in 170. I got a lot more ski than I expected. They are versatile, forgiving, willing to make a variety of turn shapes, have great edge hold, and are stable at speed. The RX8 will lay veritable trenches if you lay it over and let it run. The ski also gives great feedback without being too twitchy or too damp.
If you want to focus on long turns, go with the RX9s. I liked the RX9s a lot as well, great ski that prefers longer turn radius. If my home hill was a larger western mountain with wide open groomers or wider less crowded trails I would probably go with the RX9. But for a versatile, high performance, east coast ski the RX8 is up there with the best.
I also ski volkl explosivs, which noone would ever consider a noodle.