gamespace is nothing special. just re-packaged truespace with some exporters. If you honestly think your going to do anything commercial than it might be something worth looking at. (hardly anyone will)
There are better programs for free (maya PLE and gMax) and there are always educational licenses of the major software for about the same price. The advantage of using industry standard software is that when you go to get a job you will actually know the software availble to you. It looks really bad you only have gamespace experience on your resume.
[P4 2.8C @ 3.03 with an 866mhz FSB:: MSI Neo-2LS running PAT:: 1gb Mushkin PC-3500 DDR High Perf level 2@ 2,2,2 :: ATI Radeon9800ProAIW :: 120Gb SeagateBarracuda 7,200RPM SATA HD :: Antec Plus1080AMG]