Once you get above a certain £ value, there is a big law of diminishing returns. The frame isn't actually hugely expensive but once you start on the road of getting a custom ti frame, you don't really want to hang cheap parts off it, do you?
True - very true. I guess you can spank almost £1k on some half decent forks, these days, add £400-500 or so for some half decent wheels, £200 for a crankset etc.......
2 x £3k bikes? I think if you bought 2 £3k bikes, you'd be thinking "why didn't I buy one bike and gone to town?" Maybe. £3k gets you a lot of bike but it doesn't get you anything astounding. Or maybe I'm being daft. I don't know if there's any real justification for spending so much money on a bike
IF I was spending that much cash, I think I'd rather get a 'decent' full sus and a hardtail. £3k will get you something like a Stumpy FSR Evo, which is good enough for me.
Depends what you've already got, I guess.
Paying £1900 last year for a new Stumpy FSR Elite was hard enough (and that was with a decent discount at my LBS). Although, having the frame warranty replaced with the carbon version was a nice surprise. Just makes some of the bits now on it (stem, bars, seatpost, saddle) look a bit in need of an upgrade!!