I Need some advice on planning a trip with contiki...

Alright a friend and I are planning on taking a trip to Europe next summer. Weve been looking at tours through Contiki.com. It seems like they have some pretty cool trips..although i havent found one that covers all the places we want to go..There are some that cover most except for one or 2 cities and the others that do include that city but dont include another. just wondering if anyone has been on a contiki tour or knows any better tours to go on…? Or any other suggestions?