哪个更适合Java开发托管：Aptana？ Google App Engine？切片主机？

I am split between the benefits of developing Java (non-commercial) webapps and deploying to something like Aptana or Google cloud, or just going with a Slice Host account. Tomcat or Jetty and MySQL are really my only big requirements. Aptana and Google App Engine come with some cool Eclipse deployment options, but does scalability really matter without a large user base for the apps?I am split between the benefits of developing J