No offset issues(+45), only the bore has to be opened up a little(you can do it with a hole-saw; only needs to be about 2cm deep to clear the axle nut).
I'm keeping mine, but Miata wheels are widely available and lighter. They're just a little wider than HX's(14x6 vs. 14x5.5), and the heaviest Miata wheel of that design weighs about the same as the HX(~11.5lb). The version I have is about 10.3lb. If you get the BBS 14" version, those are even lighter IIRC