I'll briefly touch some of this.
First off, your room is fine for N3's. My room is 23' by 17' with 9' ceilings and they work great in there. I do however like using a single servo sub for the first octave.
On the BG Neo... It has been my favorite tweeter, especially the deep back cup version (that you can only get in our kits

). And I have used just about every best of the of the best dome tweeters by every manufacturer.
Now the BG Neo's are really not a ribbons at all. they are planar magnetic drivers, and they have some real advantages over the ribbons. The ribbons are great until you start letting them play very low. If they begin to wiggle at all then they are really loosing control, going into distortion, and really sounding bad. This is true with all of them and I have used, tested, or been a dealer for most of them.
The ribbons have a nice air about them and handle trailing edges well, but miss the attack a little bit. They have their own sound sometimes too. Sometimes good and sometimes not so good.
The ribbons are also very fragile. The Neo's the other hand can literally be thrown down the highway and they will still function fine afterward.
The RAAL is a little different, but in my opinion the only gem in the line is the OEM only version. I have a pair of them here right now and will be using them in a new commercial speaker line for one of my clients. I'll let you know more on it after I have spent some time with it. They are expensive too.
On the Zaph fans and followers: These guys are from the objective camp. These means anything that they can't measure in some way can't sound different. To them, differences in wire, capacitors, burn in effects, etc are all imaginary, and anyone that sells any high quality (or expensive) anything to those regards are a bunch of snake oil salesmen. And the whole group of them never waste an opportunity to take pop shots at anyone (especially me) that talks about how something sounds. So just know where they are coming from and what their agenda is.