on the list for the FX8, used to own an Ultra. I may pass on it... I still dig my new-to-me Boss GT-100 I got last month...I'm sure the FX8 does more/sounds better, but I'm not feeling the need for more or better with the GT-100. First time I have a MFX/Modeler where I don't feel like it's missing something, or have to compromise or use some work-around...
I also pre-ordered the Boss SY-300, should ship end of June...
Congrats & Enjoy your FX8!
edit: I've been using modelers for the last several years; the GT-100 is working great for me, direct to FRFR and as effects only in front of amps. Have not tried 4CM.