I know many people use 3dsMax + V-Ray for Architectural Visualization. でも、今vray@chaosgroup.com に連絡して、V-Ray をすぐ使用することが出来るよ! If you want to test the new V-Ray for XSI, send an email to Chaosgroup and ask for it! I am testing it now, but I can't say much under the NDA.