I found I never used Vue 5i either - but finally decided to upgrade to 6 just recently, hoping to justify my investment in 5, and I'm very happy I did. Even on my aging system it runs reasonably well, I've had very few crashes.

That said - I've also been thinking about upgrading my system for some time, and decided to go ahead and do it. I'm putting together a quad core intel, 8 gb ram with Vista 64-bit. Rendering should be a lot more fun.

I'm not sure if eon offers sales occasionally...

Good luck with your decision