I love my 428. It kicks major but on acoustic sources (overheads, acoustic guitar, violin etc.) Its not a sterile preamp, so not a first choice for classical sources.
I've heard of people using it for vocals, and rappers, but never tried that myself, (I've been meaning to though).
I haven't got the AD card for it, but I'm hoping to in the near future. But I would highly recommend the pre from my experience