[Will]

It all depends on the person. As you can see, some here are saying go for SEV, some say that they wouldn't recommend SEV as it is now (but it should get better, etc), some say go for Dom3... I personally prefer Dom3 at this time, but I haven't really put much time into either game yet. Perhaps a total of 20 hours over two months for Dom3, and about 3 hours combined with SEV demo and release version. Part of the consideration will likely be that Dom3 is much pricier than SEV, but I would say that Dom3 is the more complete game. SEV is getting there, and it was still fun when I played it, but since I was already familiar with SEIV AI, it wasn't really challenging.

Probably the best indicator for you would be to download the demos for both games, and give them a spin. It should give you the general feel of each game, which should make the choice a little easier. But the demos each leave out probably the biggest part of what makes each game so cool: for Dom3, the demo does not have the 300-something page manual describing nearly everything in the game; for SEV, the demo does not allow mods, which gives the series much of its balance and replayability.