The DL Classic is really a fine little gun. Doesn't get the flash and hype of some of the other FX's, but is a great shooter, accurate, smooth operating and has a very nice trigger. And I think that the new ones include the Power Plenum which is a bonus. Always nice to be able to turn the reg down (for more shots per fill) but still get nice power. I like the wood stocked ones, but FX's synthetic stocks are some of the best in the business if you went with one of those.
We ended up putting a 600mm barrel on my wife's .22, so it now has the same barrel length as your .25 will have from the factory. I will say that with that longer barrel my wife's gun's accuracy and consistency improved with the addition of an FX barrel band. And putting a Sumo on the end of your gun - well that barrel band is probably something you should think about.
Congrats on your new gun, and I hope you don't have to wait too long to get it.