You could, in theory if you set your crossover at 80hz but then you be limiting their performance.
Not really, you're limiting their bass extension, but not their performance... The Arros bass performance, while impressive for their size
, isn't impressive at all when compared to similarly priced speakers. If you let a decent sub handle the bass, it's a definite win for the Arros, as you'll not be limiting their performance but enhancing it... Instead of having 5/10 bass, the sub might give you 8/10 bass... A sub won't fix the lack of punch of the Arros at 80-200hz, but it'll definitely improve <80hz... If it doesn't, it's one hell of a crappy sub...
The Arros will play loud and with realism and have good dynamic range.
It depends by what you mean by good dynamic range
... The Arros have no punch, none whatsoever... You do not feel the music, at all
... They also, as mentioned, won't play as loud as other speakers. So I'm not sure in what sense you mean that they have good dynamic range... They can play loud though, that wasn't a problem I had a pair, but I don't listen to music that loud anyway, though they'll play louder if they're crossed over to a sub.
Another thing to consider with the Arros, they're power hungry as hell and you need a good amp to power them. They will work with an average amp, but it won't sound as good with a solid amp. By that, I mean that for example, Totem Sttafs might be fine with 600$ receiver X, and will sound pretty much as good as they can with it, but the Arros won't sound as good on it...
Example. Receiver X, 600$. The Sttafs would sound, in absolute, say 8/10 on it, while the Arros will sound 7/10 on it. Beefy 2ch. amp, 1500$, Sttafs will sound 8.1/10 on it, while arros might sound something like 8.5/10 on it. They're not driven easily, and amps will have a harder time playing them correctly... One thing which is certain, if you go the receiver route, which I don't think is recommended by Totem, make sure it's solid at 4 ohms...
As for Totem vs MA RX or Ohms, haven't heard the Ohms or the MA RX, only the older series (S, Gold, etc..). IMHO, you can do better than the Totems. If you've heard the MA and Totems, you should be in a position to judge for yourself. If you haven't heard the Ohms, not sure why you're considering them... FWIW, I went Totem Arro -> Totem Sttafs -> Ascend 340SE -> Ascend Sierra 1 -> Ascend Sierra 1 NrT
Good luck in your search
In a smaller room the Arros will do a good job at both movies and music. If you are trying to reach ear splitting SPL levels with HT they aren't gonna do that the way other speakers will.
++ While I wouldn't go back, they can definitely do the job. I used them for 2ch. music and even for HT, but at normal listening level (not blasted), without a sub, and they did the job