MI and VM versus AV and ????

[matias]

Hello listers   I'am a 5 years Mapinfo user and in a new big planning project I must use ArcView. My problem is to find an ArcView Extension tool that incorporate all the Vertical Mapper 2.5 capabilities.   I presume that I must to use two of them : 3D Analyst and Spatial Analyst. Why the medium cost of Vertical is about us$ 1,500 versus us$5,000 for both arcview extensions ????? Finally, somebody knows if ARCVIEW can read Vertical Mapper files ????........and then save money     MATIAS C H I L E