My conversion actually started off with 2 DP18s, and thanks to a woman in a Mini talking on her phone, I am now minus the front one. So I replaced it on the cheap with a Sun M13-II.
They're both fine. My DP18s have stayed true FOREVER. I've only had the Sun rim on the front for about a grand, and I haven't had to true it yet.
I think they're both fine rims for not a lot of dough, but the FGG guys had some issues with the Sun, I think.