I agree with Scott. I too have built both the Neo 2X and the AV-3's. They are both fairly easy to build, but suggest that you be fairly proficient at wood working. Also, you should be fairly proficient in soldering too. Since the speakers will be used in a small room close to the back wall, the Neo 2X's or Neo 3 Sealed might be the better choice, but you would definately need a subwoofer to extend the low end. The Neo 3 TL's should work well too but would definately need to be front ported if they are going to be placed close to a rear wall.
The crossover caps and resistors could be changed out later to Sonicaps and Mills resistors, but it would be a pain to do so. Suggest going with the Sonicaps and Mills when you build. Also, suggest the No-Rez option too. They are all well worth the extra cost.
If you run into a snag, Scott is correct that there are a lot of people here on AC to help answer your questions.
Ron