Caroline,
For my money, the best skiing (and best ambiance/scenery) is in the Berner Oberland villages of Grindelwald or Wengen. I've skiid Zermatt and found it very, very cold and windy. It's also the only area where I was warned to beware of crevasses -- so if you go there, be sure to stay on the groomed trails or stay with an experienced guide/instructor. I'm a bad intermediate skiier, and I was also daunted in Zermatt by the poor visibility caused by blowing snow. I've never skiid St. Moritz, so cannot offer an opinion. Have you found all the web sites? If not, you can compare the various skiing areas at:

www.grindelwald.ch
www.wengen.ch
www.stmoritz.ch
www.zermatt.ch

I've never travelled the Glacier Express, but its website is www.glacierexpress.ch. If I were you, I'd fly into Zurich, train to St. Moritz and stay there one or two days to get acclimated to altitude/jet lag, then take the Glacier Express to Brig. At Brig, I'd head north to the Berner Oberland for skiing instead of continuing to Zermatt. Then fly out of Zurich. You can play around with train schedules at www.rail.ch, then click on "Timetables."

Write me if you need more info.

s

ps.
But really if I were you, I'd forget trying to combine the Glacier Express and skiing this time -- unless you have two weeks. The mountains of the Berner Oberland are breathtaking, and they really should satisfy your craving for beautiful scenery. So I'd simply fly into Zurich and train to Grindelwald or Wengen and ski for 6 or 7 days, then fly out of Zurich.

s

Good evening,Caroline
If you are in the Berneroberland and
want take the Glacier Express you would
have to go from Interlaken, change at
Spiez to Brig and catch the Glacer Express there for an all day trip to
St. Moritz. Would throughly check out
the hotel costs in St. Moritz, would
think they are much higher than most
places in Grindelwald, Wengen or Murren.
You would then have to return via the
Glacier Express to Zermatt or Brig, Take
the train from St. Moritz and change at
Chur for Zurich.
Coming in from Geneva, you would have to
take the train from Geneva to Brig, either changing up to Speiz, Interlaken
and Wengen. or from Brig down to Zermatt, a couple days in Zermatt and
then the Glacier Express to St. Moritz
As S suggest would agree that Zurich
to Grindelwald/Wengen really would be
your best bet.. also check www.berneroberland.ch and also
www.swisshotels.ch.
Richard of La Grange Park, Il..