Using Logic's Sample Delay

[jasonwagner]

I would like to use the sample delay for lining up multi-mic instruments instead of shifting tracks. Couple questions;

 

It shows you can shift forward or back, is there any disadvantage to shifting things earlier instead of later or does the ADC take care of it with no issues?

 

Is there a way to use the marquee tool or something else to highlight the difference between the two hits I want to line up and be able to see the sample or millisecond count?

 

Working at 48k there are 48 samples per millisecond I believe. But I can't find a millisecond or sample read out in Logic. If there is a better way to find these values in regards to using the sample delay please do tell.

 

Thank you very much!