Hi John, firstly get the guidebooks sit down with your mate and look at the routes that appeal to you and the grade which you want to climb.
Always have a plan `B` just in case you will have to climb in another valley due to weather conditions, this will also give you more flexability.
I would recomend Zermatt as a base as there are so many 4,000m peaks there. I could recomend you a good little hotel which I use every year !
A good acclamitation route would be The Riffelhorn at 2,927m, the Ordinary Route being an easy grade scramble with wonderful views.
Then you have the Breithorn, another good acclamitation peak.
These are some of the peaks I can recomend to you - Pollux, Castor, Allalinhorn, Alphubel, Strahlhorn, Rimpfischhorn, Zinal Rothorn, then you have the higher peaks in the Monte Rosa group also the Dom and Taschhorn.
Have not done the Matterhorn yet, next season `the North Face` so tempting
If you decide to do the Hornli Ridge get out of the hut before the masses !
Well you have a bit to go at there John, hope I have been of some help, happy climbing