Logan,
these guys have the long and short of it. Mainly, if you were to make the switch, you need to be comfortable with the difference between a 1pc and 3pc first. A big difference in the two bows will be physical weight and that is a big factor for a lot of us when choosing a bow. Compared to your Morrison ILF, a wood riser Centaur with carbon/boo limbs will be feather light. And I mean light. A lot of guys who are used to a 'heavier' bow use a bow quiver on them to make up for the light weight, or pay the extra and get a Dark Matter version that adds 8oz over the wood version. I don't like bow quivers, so I either shoot mine bare or use a strap on stabilizer setup that I came up with. I have found that in the end, I can shoot the bow well using either way, I just find that when the bow is 'bare' I just need to hold it more lightly. With the 12oz stabilizer its lights out 'fuggetabowdit'
Before you take the plunge:
"You wont find a bigger Centaur supporter then me, but I would not trade a bow that i was comfortable with and really liked. I would either buy a used one, borrow one to shoot and try out before I ordered one."-Lamey
I would get comfortable switching back and forth between a 3pc and a 1pc, and then go for the all-out build.
Jim will treat you right, he's the man, and his bows have a WELL deserved reputation. Mine is about to head to Texas with me for an attempt at some porcine ethnic cleansing :D