Using Adrenalinn II in my current principal rig. I use it just before my amp (Vox AC 30 CC1). I don't tend to use the amp models that much, being that I am rather fond of my current amp. When I do, it is usually an over driven AC 30 or a Marshall Plexi. I find that making sure to engage the complete bypass and care fully tweaking the volume and effect levels, you can remove the vast majority of the (for lack of a better term) digital-ness. There tends to be this weird artifact when I don't really pay attention the the previous and play at any volume. I am not a super programming cat. Hence, I am sure there are packet of more experienced types who will probably have more in-depth answers for you. I find as long as my power is relatively clean (remarkably everything in front of it is run with a Visual sound OneSpot).
As far as filtering options, you might want to look at the Adrenalinn III up-grade ($99.00 on Roger Linn Site). Supposedly more filtering options, the amp models sound good on the clips and there are more of them. I am not familiar with the Behringer bit if kit to which you refer. I have no real way to compare.
Tell me if this is at all helpful. I may not get back to with blinding haste as I am neck deep in dolls and dirty nappies.