I was in a similar position earlier this year, looking for a 4-string to go with my 5-string Carvin. After reading lots of reviews, I went with a Ray34, and I couldn't be happier. I think the consensus is that the Ray34 is almost indistinguishable from a legit MIA Stingray--most seem to say that they either can't hear or a difference at all, or else if they can, it's really, really close.
The new SUB line is definitely a budget line, though for what you pay, everyone seems to think it's a great bargain. The Ray34 is a big step up in cost, but to me, at least, it's definitely worth it.