I have just 2 points to make :

1)You only buy a Colnago or a Pinarello for example if you love Colnagos or Pinarellos. If you're not sure about spending $2500 then you should not be considering such brands since everything you're looking for, with a focus on 'riding' is available for $1500 (complete bike).

2)For a 6-2 person a frame between 58 and 62 cm will do (measured c-to-c) with a preference towards the smaller, say 59. All other adjustments can be easily obtained with proper selection of seatpost height and stem length - something very common with today's compact frames. The more detailed frame fit and other adjustments possible are academic or if you're trying to get the last 5% performance out of your body (this gets more dangerous with age).

Pick a bike comfortably within your budget and ride, ride, ride. Good Luck!