I have the Remus full Ti system which I mounted myself, prior to this I read postings on many sites and discovered an interesting step to complete after installation. I also have the evoluzione race filters and still run v/5.x (as far as I know, having my bike in for an extra oil change last month... hopefully they didn't hit me with an upgrade to v/6.x that I don't know about) the dealer gets to change my oil one more time (only at 4,000 miles)
This step involved disconnecting the battery, reconnecting, turning the key switch to on but not starting the motor, twisting the throttle from idle to full on 3 times (with motor not running). Turn the key off and then back on and starting the motor.
I do not have "popping" on deceleration, there is some idle rpm variation (1100-1250 pulsing) but for the most part the throttle is responsive.
This weekend I will have a dyno completed to determine what the gains may have been achieved with the current configuration and the discuss possibility of adding a chip/power-commander to the mix.