it's not advisable to use a notebook as a primary development platform. normally, development takes months or years, and you will want to adjust your hardware due to your new requirements. a notebook will never be able to do so.

never use intel integrated GPUs. X3100 performance: doom3 is unplayable in 1024x768 med details. http://www.notebookcheck.net/Intel-Graphics-Media-Accelerator-X3100.2176.0.html actually, it's one of the slowest chips on today's market. however, it's fully programmable and consumes very few power.