Poll: SE IV Platinum or SE V?

[Q]

If you could choose between a new improved Version of SE IV called e.g. Platinum with new working abilities, improved AI, new weapon damage types and so on, but which would be compatible with the current SE IV (current mods, races can be used)
or
a new SE V, which would be a completely new game with e.g. better graphics, new interface but as incompatible with SE IV as this was with SE III,
what would you prefer??
I think that the possibilities of SE IV are not yet exhausted and I like all the mods and races available. Therefore I could play happily with a SE IV Platinum Version for some more years.