These are lovely monitors but are kind of their own animal. The lowest they go down to is 90Hz so they won't be much good for checking bass. They're supposed to be a recreation of the Auratones or "Horrortones" as they were called that were in a lot of mixing studios back in the day and were used more to simulate small crappy speakers with a big focus on what your mix is doing in the midrange.
Checking your mix in mono on a single avantone is a great additional tool to have in the arsenal but they won't work as main mixing speakers
The original Event Studio Precision 8 are kick ass monitors, as mentioned somewhere on this forum by multi plantinum producer and mixer Ken Lewis. You can pick up a used pair for about $500. They now have a new incarnation of this speaker called the ASP 8 I think? Way more expensive and not as good. Event got sold and taken over so you want the originals from when Event still owned Event!! A friend of mine has these originals and I really really liked them. Some nice bass and treble trim pots on the back too. They're self powered, when they first came out I think the list price was $1200 http://www.ebay.com/itm/Event-Studio...item51a20d0e49
This ebay link says they're passive (meaning needing an amp) but I don't think they came in passive. Anyway, that's how they look
Here's another link that shows them as active (self powered) but of course no longer available, so you would have to look around used gear sites to find them http://www.americanmusical.com/Item--i-EVE-ASP8-LIST
My bad, the link above says they came in active or passive. So if you look around you should be able to find an active pair for $500, that's what my mate said they should go for, though sometimes you'll see them for a little bit higher, like $600 or $700. My mate paid $500 for hers