I've been using an IA-7 integrated to drive a pair of MG1.6s for the last month or so. Power-wise, there is absolutely no issue whatsoever, at least up until clipping (which I haven't tried exploring yet in detail because I live in an apartment). It's still the same relaxing, totally coherent, and extended (on both ends) performance that NuForce is known for. It's particularly good when fed with a high-quality preamp through its HT pass-through, which is why I'm hoping to move to NuForce monoblocks soon.
Hope that helps.