Godday mate,
You already received some good advice. Let me share my own experience. My K-7 was my first dSLR after 10 years of digital P&S ultrazooms. I decided from the beginning to miss the kit lenses that did not correspond to my needs.
Chronologically, I bought: (1) an all-around lens Pentax DA18-150mm, (2) a fast prime lens Voigtlander Nokron 58mm f1.4 for low-light conditions, and (3) a macro lens Tamron 90mm SP. So far these covered my initial needs as well as my interests to learn more.
You may be interested by my geographical purchase pattern. I bought the DA18-250mm as a 2nd hand lens from
www.keh.com, the Nokton 58mm from Adorama and the Tamron 90mm from Photo continental in Brisbane. At the time, the DA18-250mm and Nokton 58mm were cheaper overseas, while I got a good deal for the Tamron at the local store.
Overall, my usage is 60% for the DA18-250mm, 30% with the Nokton 58m, and 10% with the Tamron 90mm. I love the flexibility of the DA18-250mm and its decent IQ for such a zoom range. I would not go without it. The Voigtlander Nokton 58mm is a my favorite: I love it, and I learned a lot with this MF lens. The IQ is outstanding. I am still learning with the Tamron: it's the last lens that I purchased. I could do probably without but I intend to learn to use it more.
Hope that the experience will be of interest.