Ok, first, Rio PowerFlex is a copolymer, not a monofilimanet. (although, yes, it's nylon).
Second, we've had huge arguments on this board on whether or not FC is actually better. And the general consensus is, yes, for some things, and no, it's worse, for others. Depends what you're doing.
The major disadvantage of FC is stiffness. Your Rio Powerflex is more supple and will result in a more drag-free drift than any FC brand. For ultra selective fish that are mostly drag shy, your Powerflex will outfish a FC. You're gonna see this advantage the most when fishing smallish dry flies. The other advantage, IMO, is stretch, which acts as a shock absorber when playing larger fish. Though with FC the lack of stretch can be compensated for with the right choice of rods and reels, plus technique. And if you want the stretch, you merely need it somewhere in your leader, not necessarily the tippet.
The advantages of FC are marketed to be visibility, but frankly, I and many others think it's a load of B.S. or at least severely overplayed. It does have real advantages, though. The biggest is superior abrasion resistance, so it'll hold it's strength better when rubbing against rocks, sand, and toothy fish. Trophy hunters and the saltwater crowd love it for this, and they're not wrong. Knot strength is another plus. And it won't degrade in UV light, so if you leave your leader on too long it's ok. And being stiffer isn't a disadvantage if you're tossing streamers or deep dredging with heavily weighted nymphs.
What's worth what is up to you. But your post makes it sound like FC is always better than a copolymer and it's all about whether you want to spend more to get more. That ain't always the case. Copolymers are actually better in some circumstances.
FWIW, while I have FC's and other brands in my arsenal and use them for certain situations, Rio Poweflex is my workhorse tippet of choice.