.ISO or not, you are still going to have to install the latest patch after a fresh install which in a few years might as well be a fresh download.

I just have one request in regards to the setup-

Please do not go the TERA route and have the setup client automatically choose a directory for you.

I tried installing TERA the other day and after the download finished I realised that it defaulted/automatically installed it on my localdisk which is a small SSD.. I am sure I am not the only one in this case...

So please don't make this small mistake.