Sand vs. Barebottom?

[mandyplo]

Doing a big tank move probably in the next months time... Currently have 2-3 inches of fine aragonite sand...

Considering going barebottom but don't really know much about it, what are your opinions, preferences, experiences?

If it makes any difference I'm adding a sump to my system... should I just have sand in the sump and barebottom in the display?

Any other substrates you guys reccomend? Thanks in advance