One fellow said something along the lines of: as soon as you can afford low end separates you should go that route over a more expensive integrated due to the interactions in the same chassis.
LOL! What a twit! Maybe he meant that low end separates would beat a low end integrated amp, in which case he could be right.
Yes, in the last 10 years or so integrated amps have come a long way, yet some audio snobs still refuse to give them their due. I have listened to a $6500 integrated amp go toe-to-toe with $20,000 separates and not only did not get embarrassed, but was surprisingly close. I would say the results were mixed. That integrated amp also embarrassed many separates costing more than it did.
Yes, theoretically separates have the potential to sound better, but there are many mitigating factors that can keep that from happening. Mismatching separates, extra cables and power cords are just other chances to screw up the sound. My current separates list for over $11K, yet I would be very tempted to switch to that integrated amp if I could find one.
Integrated amps will give you the best bang for the buck. $5K worth of separates may beat a $2K integrated amp. $10K of separates may beat a $5K integrated amp, etc. It would probably take over $50K of separates to beat VAC's $22K Phi Beta 110 integrated amp.