This is just my 2˘ and even at that you're overpaying. I'm not an expert by any means, so this is largely just crew opinion.
I race on two boats, one a 46' and the other a 26'. Both have Asyms, the big boat has both. The one on the big boat is a handfull. Without a bowsprit, it can be tricky to gybe as the sail tends to wrap the headstay when trying to get it to the "other" side. On the smaller boat the asym is smaller and the boat has a sprit, making the whole thing more manageable. Especially in the small boat, the chute adds considerable performance off the wind, but won't fly dead downwind; you have to sail hotter angles. Both go much farther upwind that I would have expected. I've had good luck with UK sails down here. I would imagine Newport is rife with sailmakers.