Thanks for the suggestions
I think I've found now the best solution where I can have the best of BOTH worlds.
I'm going to use SLED 10 as my daily work machine. With Vmware (or Parallels) I can install 10.2 as a Guest OS and tinker around with this when I want to. If stuff doesn't work I just trash the VM and start again --keeping the normal SLED 10 for "production" type work.
I've added the OSS 10.1 repos to the SLED sources so if I have to install extra software it will work fine.
If the next version of SLED is anything like this one it should be a real winner in the OS desktop stakes.
Even my Mum had no problems at all using Open Office (she's used Word for years). She Hated Office 2007 on Vista preferring the Office on XP but found Open Office on SLED 10 more than acceptable. In anycase the VISTA version ran on her machine as slow as molasses.
I think we've another "Penguin" convert.