That's too bad ... I had read some good reviews of the Spitfires. They were on my short-list together with Sport Demons (which I have now) and Avon AM26 Roadrider ... have been reading some good reviews of the latter both here and elsewhere.
Pricing here in Canada is typically higher than you benefit from in the US (and XR not helping!) - here are prices for stock K75s 130/90/17 rear size from my preferred national supplier (excl tax, but incl shipping, additional disc applied if front purchased also) :
Sport Demon $ 183
Spitfire $ 137
AM26 $159
So I'm thinking I'll give the Avons a try - front is available in both stock 100/90/18 or alternate 110/80/18 (3mm wider / 2 mm lower diam) ... any thoughts on which would be the better choice for the front?
Gio