For Dell prices, you can visit their online store (www.dell.com.tw) to configure your own or just call them.
It is said both companies have good afterservcies in Holland. Acer is one of the top 5 NB palyers in Europe, so is Dell. Dell is also the 2nd largest NB brand in the world.
Dell D600 prices usually include 3-yr global warranty but D500 include only 1-yr Asia-pacific warranty. D500 is quite similar to Acer TM 290, but D500 is lighter. D600 has ATI M900 graphic card which gives nuch better graphic quality.