Hi Dazzer, another one if you just want to get started along side the Rail would be something like an Ion, you can still get spares as i believe the SP8 which is still being sold has the same internals.Correct me if i'm wrong guys.
From personal experience like most of the guys said, Planet Eclipse ETEK/Ego's are great markers, they just work!
I always found DM's great to shoot but if you have an issue you can be scratching your head for a while, fix it and still notbe sure what you've done to fix it. lol.
A good one mentioned earlier would be the Planet Eclipse Etha, it a tourney style but you can pick up a body kit for it to make it more milsim if you prefer the look.
Hope it helps you with your purchase.