I've been on a recent polyester film cap testing spree (gasp) and am planning on using them in a phono preamp. Currently, I really like:
Siemens / Epcos SilverCaps, which are rather unique in that they are not coated. Datasheet:
http://www.epcos.com/inf/20/20/db/fc_2009/MKT_B32560_564.pdf
Evox MMK, similar to some of the Wima lines, nice and compact sizes. Datasheet:
http://www.kemet.com/kemet/web/homepage/kechome.nsf/file/MMK%20Series/$file/F3294_MMK.pdf
In general I prefer polystyrene _box_ caps though, but am trying something different in this particular design.