Recommended network for credit card offers in the US/UK

I've been running sites for credit card aff programs for years and have made some nice money off of it. I live in a small country, so I figured I should try to expand; I would like to try to make sites in English and run campaigns for my sites in the US and UK. But my problem is that I don't know of any *good* affiliate network(s). I hear a lot of bad things about a lot of them, everything from them not paying everything they owe to not paying out at all, cancelling your account and keeping the money themselves.

Now, I work on my computer for a living, I'm professional and I don't mess around, so I need professional networks to work with.

So my question is, does anyone here have networks to recommend? Preferably they are located in the US and/or the UK. I'm after personal experience here; what you have read yourself online is completely uninteresting to me if you don't speak out of experience.

I've worked with buy.at and Zanox before, as well as Tradedoubler and several smaller networks. I like TD best, but I would consider working with Zanox again if they have any good programs.

All input would be appreciated!