Best Storage Tank Design Program

[FabianoRibeiro]

I intend to buy a storage tank design software and would like to know the pros and cons of each software. I made a research in the internet and found the following:

Tank
Tri*Tank650/620
Etank 2000

Which one do you think is the best purchase?

 

[Motorspirit]

I couldnt comment on which is the best, however we have found that the seismic design section of Etank is not updated regularly enough to keep up to date with the revisions of API650 APP E.