I've had an NL210 for over 3 years now. It's not a bad DB cabinet, I've used it as such many times. The way the tweeter crosses over does create a honk as you move up on the G string that is difficult to tame. For whatever reason it sounded very nice with a Glockenklang Heart Rock, but that's not quite the most portable head for DB playing.
I have since seen the light with a VL208 cabinet. Unfortunately it doesn't always work for electric when you want a more modern sound. I love the NL210 for electric playing and actually just picked up a second one for really large gigs.
I've spent allot of time and money trying to find the right set up to double with no luck. As it turns out very few of my gigs actually require me to play both instruments significantly, but I have brought out a VL208/NL210 stack and swapped the speaker cable as needed, that's to much work for me though. So if I've got an electric gig where I am going to play DB for 1 set for some swing tunes I will deal with what the NL210 can do. On the other side if I am doing a jazz gig and the guys want to jam out the last set with some fusion stuff I'll take the VL208.
There is ONE acception to the rule, I used to own a SA410 (Sadowsky 410) which is almost identical to the Bergantino HS410. Jim Bergantino designed the Sadowsky cabinet and it is over 95% similar. That cabinet is as good as a VL208 for DB playing and is a killer electric bass cabinet. BUT you have to be comfortable lugging around a 85lb 410 cabinet.
There will almost always be a sacrifice on one end or the other and from my limited experience an IP112 is probably as good as any choice.