this is my first post here, I've this question:
I really like my hosting provider, I had no problems in many years, but it offers only php 5.1.x at the moment plus it require the extension .php5, memory_limit is 64mb. It is something I can manage or is better to look elsewhere?
As far as I know, the requirement of .php5 extension is not a problem, as you can change it via the .htaccess file. I don't know what is the current memory limit, but 64mb should be all right - all my sites run on memory_limit 64 and I had no problems recently.
The memory requirements depend also on the type of your site - usually the bigger it is, the more memory it takes.