Cheap textured black polys I've tried are Volkl Cyclone and Pro's Pro Blackout. I'm mostly a weekend warrior, so I don't play everyday, but both strings I've tried in hybrids and I think they're good for the money. Volkl Cyclone is around $6 a set and Pro's Pro Blackout is only available through Euro dealers and I think I paid like $50 for the reel (I'm sure $10 of it was shipping). Believe it or not, I find Forten Competition Nylon an excellent string to hybrid with polys. Forten Nylon is only sold in reels, but comes in black and it's dirt cheap at $17 a reel. Many others here who've tried Forten Nylon in such a way will tell you the same.