I KNOW!!! At all the wool shops I've been to (including the ones whose advertising says 'all our staff are experienced knitters'), I ask after circs that are good for either ML or 2 circs - I have to explain it's to knit socks etc. on larger circulars - they say 'oh no dear, on a circular needle you can only knit big things in the round, like jumpers'.
My circs are from Spotlight, I am not too bothered by their having snags (but maybe if I had used the KPO I'd notice a big difference!). Maybe you would be happier with them? I use the Knitter's Choice metal ones (very pointy tips).
I plan at some stage to organise a load of American knitting stuff to be sent to me by someone who takes pity on the terrible supply here, either in exchange for some NZ wool, or just recompense straight into their bank account overseas. There's not a lot of the kind of wools I want - solid bright-coloured sock wool!
Of all the shops I've been to, I was pleasantly surprised by the KnitWorld shop when I was in Wellington recently, the Tawa branch was okay, but the Cuba St one was great! Striping sock wool, some FREAKIN EXQUISITE merino, Jo Sharp and Rowan wools, great range. I have ordered some stuff to be sent to the Auckland branch, like Rowan 4-ply soft for socks, they also had beautiful merino variegated suitable for socks (I hope). I have never seen any hand-painted sock wool before that: some self-striping (like in 5 different colours total in all my shopping), some beige, grey, or black Patons plain sock wool, so I was ecstatic to see the beautiful subtly variated stuff! Must check out the colour card for the others colourways at the Auckland shop.
But again, they were no help with good circulars (I've seen 60 and 80 cm lengths but no longer).
If you want nice wools, I recommend trying there - they even had some part-alpaca wool! I've gotten sock wool and seen 100% alpaca wool from trademe, from time to time some Rowan or Debbie Bliss pops up.
There's a woman in Herne Bay in Auckland who sells Noro, DB, Rowan etc. wools, she will accept payment by direct bank deposit and ship to you.
It might be worth painting some clear nail polish onto the circs you find snaggy and seeing whether that improves them?