You do know that a $4000 Ti bike is only marginally better than a $1000-1500 alu or steel bike, yes? And that most of the value of an expensive bike is very personal - it comes from exact fit with you. You'd be much better buying a used Kona Jake or whatever, riding it for 6 months, and then making an informed investment of that $4000. You'd get most of the cost of the used bike back when you sell it, and you'd get the right $4000 bike instead of the wrong one.