Those rims are sweet, but after doing some research on our MPV, they need to have a high offset like the proteges. I think stock is +50mm on a 16x6 or 17x7, if you lower it you will run into the same problems we have with the Proteges, you might get some fender rub. So, I am not sure those rims would work, they are only a +42 offset on a 9" rim. I think you will be sticking out too far and will probably have other issues. Here are some other rims that I think might look good, although not as good:
18x7.5 +48mm
19x7.5 +48mm
Also, how do you plan on lowering it? There are no springs available here in the states, unless you get some custom made or TEIN has some, but...
(from an email from TEIN USA)
"We do not offer those springs in the US. It has to be special order from Japan. And there will be a two to three months wait
before the springs would arrive. And the product would have to be prepaid."
Or you can go air bag setup. I love our MPV and am about to install a DVD/drop down screen in our and have always thought about tricking it out a little. I am also looking at build a custom box for a 10" sub in the factory location.
Good luck