Even the Hoya Greens are pretty good.
I would live with it.
It's only really when you start stacking cheaper filters that problems come in.
I would get a skylight 1A for general use / weather sealing, as the polariser could cost you up to 2 stops left on the lens.
Canon 7D, T3i, EOS M, EOS 3, GoPro HD Hero & Hero 2, powershot sx230 hs, Canon 70-200 f2.8 L, Canon 100mm f2.0, Sigma 70mm f2.8 Macro, Canon 50mm f1.8, Canon 22mm f2.0, Sigma 18-50 f2.8, Tokina 11-16 f2.8, Lensbaby Composer, Holga HL