I'll throw in a vote for the Garmin 76CS
, and a few gotchas also.
I think it has all the technology you are looking asking for: a color screen, a full page screen that plots elevation profile vs. time, altimeter (the "S" in these Garmin units stands for sensor, as in barometric pressure sensor) that works when you lose GPS signal. It will calculate vertical and horizontal distance and speed (instantaneous and maximum), see gotcha, though.
Be aware that with both the Garmin 76CS and the 60CS you'll need to purchase additional maps on CD (Garmin's US Topo product, app. $100) to get the topographic details I suspect you want. The base maps included with each of these units are basically road maps. But the Garmin US Topo maps are US Geological Survey 1:100,000 topographic maps that have been around in paper form for a long time, (note, not the 1;24,000 quadrangle topo maps). Garmin's website has a nice MapSource Map viewer that allows you to see their maps in action before purchasing, you can for example zoom in on your favorite ski resort and see what the map looks like.
The gotcha, (a repeat of what others said), is that GPS is not perfect for skiing. The angle and orientation of your body, as you're going down the slopes, will interfere with the GPS signals, and combined with the mountain itself blocking out a good deal of the available horizon, you'll experience lost signals. Therefore, be suspicious of the speed calculations. I read somewhere to put the unit in a backpack, and at the top of the pack, for maximum skyware coverage, when skiing, and that sounds like good advice. Additional gotchas: these two units are not small, they will be bulky inside a jacket. If you do use the US Topo product, after you upload the 'breadcrumb' trails to a PC to view, there is no elevation profile plot available on the PC, that is only available on the GPS unit's screen.
Don't go by the list prices on Garmin's website, or Magellan, or others either. One good source is www.gpsnow.com
, (very reputable, select the unit and add it to a shopping cart to see the actual price), or www.tvnav.com
. Sometimes amazon.com has better prices on the map CDs that these GPS resellers.