There shouldn't be any problems with this setup, but why are you going to buy the springs and retainers when you don't need them. The ITR/CTR cams can be used with your stock springs and retainers. The only reason I can see for using them, is if you were going to raise your rev limit to 9000 or more. But since you said this would be your daily driver I don't see that happening. instead of the springs and retainers, I would just buy the Apexi VAFC and get some dyno tuning done to max out the power.
well, that just my opinion anyways