Your favorite Small Apartment Speakers

AudioNote UK AN speaker line are very nice in a smaller room because they work best in a corner, so you do not need the speakers way out in the room with you to sound their best. I'd also second the ProAc smaller speakers.

But really stand mount or floor stander is not going to be any different so a smaller set of floor standers wound work too.
 As Duke already mentioned.

@OP,
Yes, I think the Gaia should help with unwanted bass frequencies migrating to other apartments.
FWIW, I hope to be trying some Townshend isolation products with my system. I just need to get some time to play...
And, as an aside,
I live in a single family home about 100 years old. My main system is on the first floor.
If I go to the basement, I hardly hear anything. If I go upstairs, there is also not much I can hear- unless I really crank it up.
Bob

@audiokinesis 
Interesting. I will reaearch further. One speaker I heard that I liked was the Spatial M5. I had ruled it out as a floor stander. 

@arion  
Absolutely not opposed to DSP. I have zero experience with it but if there's a step by step I should be able to get it to work. I don't frankly care how accurate or linear a speaker is, all of them are to some extent in the higher dollar brackets. I just want something that sounds good. I like my Focals, but I feel like I can do better. My only reservations about DSP is that it typically adds a substantial cost. I was, for a while, looking into miniDSP or something of the sort.

@gdnrbob Thanks, I will look more into that. I want to be a good enighbor, even when I'm being a bad neighbor haha

I own a pair of Fritz Carrera 7be's and they are a pleasure. Scanspeak Revelator woofer and Transducer Labs pure beryllium tweeter. Very detailed throughout and go down to the mid 30's. First order series crossovers. Very well built. I find no need for a sub with these guys.

I would check out the Monitor Audio Platinum 100s.  Tons of detail and good for rock and metal music.  Good bass response as well with a rating of +/- 6 dB at 40hz.  They need to be driven by a neutral to slightly forward amplifier.  

There are four dealers in AZ.  Give them a call and see if they have them on display.