Have a better suggestion for HT audio?

I'm building a relatively modest HT system in my family room, so size and WAF are big factors in my choices.  My sonic preferences run toward neutral, but my biggest must have is a center channel that's not much higher than 7" tall and that has the juice to believably produce heft, especially in the lower mids (think being able to credibly and accurately portray Darth Vader's voice).  Also needs to have good dispersion so people around the room largely hear the same quality center sound.  Second priority is tight and impactful bass that will let me feel the rumble of effects in my chest at least to some degree, although room shaking bass is not a requirement, and size is definitely a limiting factor here.  Third priority is a relatively seamless sound across the front 3 speakers.  Room is 23' x 13.5' with 8' ceilings and has open archways to other rooms on two walls.  Budget is roughly $2000 new or used (already have TV).  I'm mostly a 2-channel guy but dabble in HT, so would be interested in your recommendations here.  This is what I'm currently thinking of going with.  I'm fairly certain I'll be happy with this setup from a sonic, size, and WAF standpoint, but if you guys have better suggestions given my priorities I'm all ears.  Thanks in advance. 

Front L/R/C
Aperion Intimus 5C and 4T -- strong bias to center with tweeter mounted above mid or mid woof.  Prefer small and thin floorstanders to monitors due to little ones running around and very limited space. 

Surrounds
Gallo Nucleus -- due to WAF cannot have small rectangular boxes hanging in back corners of the room.  Little white balls might go over better.  Trying to avoid in ceiling but may go that route so options welcome.  Would probably just go with Intimus in ceilings if I do that. 

Sub
SVS SB1000 -- a 13" cube is about all I can cram into our spot (hence the sealed box design), but may stretch to SB2000 if added bass foundation would meaningfully up the HT experience. 

AVR
Yamaha RXV479 -- this pretty much has all the features, reliability, and sound quality I'm currently looking for, but might stretch to RXV679 if it's significantly more future proof and/or offers some useful features I might be overlooking.  Particularly I'm thinking about it having 3 HDMI 2.2 inputs with the 679 instead of only 1 as in the 479, although not sure if I need more than 1 if I'm not planning on doing Blu Ray. 

Sorry for for the long post but just wanted to give you guys all the pertinent info to work with.  Looking forward to your thoughts and recommendations.