First let me say this: WOW! I love love love the pattern!
It will be DYNAMITE on YOU! Perfect!
So am I correct in assuming that you can't wear Cascade 220 for very long due to the 'itch factor'?? Wool makes you itch?
And I concur with you about Malabrigo! It would look horrendous after about a month. And since this pattern presents a lot of st st for the front and back...the pills would look awful! So let's stay away from Malabrigo for this pattern!
Can you wear Jo Sharp Silkroad Aran Tweed? It's also available as JoSharp Silkroad DK Tweed, which I've used twice. Once for me, and once for my brother. Neither sweater has pilled a lot (just a teeeensy at the outset)...but the subtle tweed does 'mask' any itsy bitsy pills. After a bit, the pilling gets over itself. Anyway, I highly recommend this yarn. It is a natural fiber, being 85% Wool, 10% Silk & 5% Cashmere. Very soft, but not too soft that pilling in uncontrollable.
It is a very subtle tweed, not "out there" as some tweeds can be.
Anyway, right now I googled the yarn...and Webs is out, and Jimmy Beans is out, and Woodland Woolworks is out...but, take heart. I'm sure someone has it! And I'm sure your LYS can order it for you!
I'm a big fan of KnitPicks City Tweed! They offer a dk weight, and an aran weight. FABULOUS COLORS and I'm a City Tweed
addict! Here is a coat that I knit for my daughter, using "Orca":
Best wishes on your YARN HUNT! Your sweater will be awesome, and easy, too!
You definitely have the skills to breeze through it!