In reply to BigLob:
If you go in good visibility this will be the easiest 4000m peak you can do bar perhaps the Allinhorn ( not via the Holaubgrat but tourist way ) - when I climbed it we had bad visibility & heavy snow on the way down : in these conditions it is possible to get lost on the Gobba de Rollin (sp) plateaux c30 years ago a number of ski mountaineers all froze to death in a spring storm after failing to find their way back to the Kleine Matterhorn.
We dossed in one of the marshalls huts under the ski tows for a while while the weather improved so unless you are very unlucky with the weather or you are not quick enough to take some bearings you should have no problems.
Don't bother with a guide but as its your first trip do do some research on holding falls & crevasse rescue & learn how to prussick , wear a helmet crossing the glacier for no other reason than if you or your partner do go into a crevasse ( highly unlikely ) you won't knock yourselves out & you can then prussick or twin axe climb yourselves out , suggest you have 15 metres between you on the rope as with less you much reduce your time to avoid following your partner into the slot.
As others have said though it will probably be so busy if you went into a slot there is a very good chance others would help you out - however not good practice to rely on this as sods law says no one is around when you need them.
Have fun the views are great , why not make it an early start & continue to onto Castor or Pollux or come back up again & try these later in the week.
Cheers Sean