I've used Photoshop for years, and although Adobe are pushing this as their biggest update yet, I don't agree. From beta testing reviews, there are some gorgeous new features, like GPU acceleration for some things, and context-sensitive resizing, but I gather most of the update has happened behind the scenes and the user won't see as much new as they may be expecting.
I would shop around, too. Photoshop Extended CS4 is only £887.12 (full, not upgrade) from Adobe's own UK store, and Amazon are trying to sell it for almost a grand!
If you have an old copy, you would do well on the upgrade pricing.
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