IMHO,
It is best to go with electrolytics with a lo ESR, as they are beter suited to applications of this nature( switching regulators.)
Tants have their place where lo leakage current is a requirement( as in timing circuits)
They are also used where space is at a premium ie high density layouts, although that said, electrolytics can be very small too.
Normal electrolytics, I generally use where they dont dont fall into the above categories.........
Just my 2 pennyworth :?