We routinely use NEB cutsmart  buffer in combination with  various enzymes  like BamHI-HF , EcoRI-HF and NotI-HF to digest plasmids as well as bacmids. So far we did not come across any distortion or anomaly in the agarose gel running pattern. If you think using this this buffer distort your band, I would suggest to heat inactivate the enzyme reaction at 70C for 5-10 minutes before running it on  the gel. Hope this helps. 

Additionally you could also try digesting with  BstYI or NdeI in NEB buffer 4 or NEB 2 or 2.1 respectively  and compare whether these digestions makes any distortions.  

Also make sure your DNA preparation is ultra pure.

Thanks for the suggestion on the buffers. What I've been doing now is not diluting the digest 1/2 with TE before adding loading juice. Seems to work. Thanks!