I have decided for some completely insane reason that I want an AR-15 pistol.

To save a bit of money, and for the personal satisfaction of creating something, I'm leaning toward assembling it myself. Other than delays in shipping (some 8 months), I've had no problems with Model 1. I've also come across Gunsmoke Enterprises which is appealing due to abbreviated buffer system.

So my questions are as follows:
1. Does anyone have experience with GSE weapons, and can you rate their quality?
2. Are their any other short buffer systems I should look into?
3. Is the short buffer a worthy idea, or does it ruin the reliability of the weapon?
and the most important
4. How do I justify this purchase to my wife? Seriously what are these things good for?