Money isn't everything.
There's alot more to custom guitars than the price, not everybody is prepared to design a guitar, nor wait months to get it built. And don't forget, you are essentially buying unseen - Some people just don't like that.
There's an aura on this forum that its never worth buying a production guitar over £1200, because Custom Guitars are OHZOMUCHBETA!!!
Production guitars can be brilliant guitars, and worth the price, if you like the guitar, and you're prepared to hand over the cash, that's all that should matter.
And MDV, Yes, you didn't like the Caparison you played, and neither did Dave, but even on this forum alone, I have read more people say they are great than say they are bad. Its like Marmite I guess.
And don't forget, we've all had the situation where you're in a guitar shop, and you pick up an axe which just speaks to you, on every level. A guitar which is so perfect for you that you buy it there and then, and never look back. Look at all the Miras being bought in similar situations recently. Surely that element of spontaneity and impulse, is something which can't be emulated with custom guitars.