Hi Todd
first off, what Danny said about joining a family seems to be very true around here... whether it be Sanny himself or someone else in this forum, there always seems to be help available if you need it. Someone is always willing to help
My first build was a pair of N3 TL's with the Sonicap/Mils upgrade and they are wonderful (my folks now have them and simply love them). I was driving them with an older Integra DTR 5.3 at 80WPC which I believe is the same as your reciever and basically mde by the same company. They worked very well together.
I do believe the N3 cross over is a bit tougher to assemble compared to the AV3 ( the N3 network diagramed in a chematic while I believe the AV3 is more of a picture/beginner format ).
I can't say enough about the Neo 3 tweeter, it is so detailed yet never fatiging, it's very smooth.
You'll be amazed at the bass response of those 5 1/4" drivers via the TL. Very tight and defined. Takes a litle geting used to at first (might seem a bit weak if you are used to "boomy" spekers) but once you get used to it, there is no going back.
I was also very impressed with the X LS Encores I built for an Xmas gift. At $149 for a kit, they are impressive.. I don't put them in a class with the N3's but for $149 , wow

Also worth noting, the X LS Encores i built and listened to did NOT have the Sonicpa/Mils upgrades, by adding them you'd take them up another level as may here can confirm
hehe, once final comment, when I was trying to decide between the AV3 and N3 for my first build, I finally went with the N3 feeling that if I didn't , i would always wonder what I was missing and figured I'd end up just wanting to upgrade if I went with the AV3.
Like I mentioned above, I was extremeluy happy with the N3's and could have easily stuck with them for many years . However , an unexpected request from my folks to buy them sent me down that upgrade path anyway

Good luck with your first build whatever you decide on. if you do end up going with a GR product and feel up to it, I'm lots of us would love to follow along if you were to do a build thread, they are alwyaas great to watch .
-jay