Danny,
phpBB has a very good Forum Software Package. I currently Admin 5 Forums running phpBB. vBulletin is comparable to phpBB and I would not see any need to change from one to the other.
Another example of vBulletin (Version 2.3.4) with:
Members: 65,600
Threads: 272,328
Posts: 2,392,969
Is the
Amdmb.com Forums running about the same load as PPRuNe without issues.
If 126.9 feels aggrieved and has an axe to grind with the PPRuNe, then maybe the thread should be moved to Jet Blast. Everyone in this forum works together to help others. The only Axe Grinding allowed here is the PC vs MAC Axe Grinding we all kiddingly enjoy.
Take Care,
Richard
P.S. As TCS said, we would love to hear the specs on your new Server. Just cover it with some plastic before you let TCS near it. We do not want his drool to short it out!