I have two questions regarding Ubuntu. I currently help admin a site on a VPS running what looks to be Ubuntu 5.12. We have to move to a new VPS service next month and they offer several different OS's (CentOS, Ubuntu, Debian, etc.) and I want to stick with Ubuntu. The service offers pre-install of Ubuntu 9 or 8 (32-bit or 64-bit). I'm going to go with at least version 9, but am curious if I can (or should) upgrade it to version 10.10. Thoughts? Also, after a lot of research, it seems most people recommend using the 32-bit version to keep memory usage to a minimum, yet the Ubuntu site recommends the 64-bit version. What are your thoughts?
So, to paraphrase, should I use Ubuntu 9 or should I upgrade to 10.10, and should I use the 32-bit or 64-bit version?
The VPS specs are: 1024MB RAM, burst memory to 2048MB, 60GB storage, CPU burst at 4 cores @ 2.67GHz each. The site is primarily a vBulletin CMS & Forum site with some WP, but we are going to be migrating the WP stuff to Joomla soon.