Morphyx!
As i virtually make the same music as you do, i perhaps can but this in the same point of view.
What caught me with the XP-30 was first the enourmous sound-quality of the patches. I actually was out browsing, and the XP was the only one i hadn't listened to in the store so i sleepily asked for a pair of headphones from the manager. Woom! I stood there for 2 hours and couldn't get away from the damned thing. It ended up with that i, in a state of trance, walked right up to the salesman and bought it. Right off. I didn't even plan to invest in a synth at all.
Now, afterwards, i am very happy about it. For your/mine kind of music it has some amazing pads and very nice analogue background "noises". If you use strings, which i do excessively, you are in for a mean string machine; the onboard Orchestral expansion is amazing.
And when you get to know it a little better, it can be toyed with alot. I also have a Korg N5, which i love for it's pads and soundscapes, you should look to it as well since it is much much cheaper and could perhaps buy both.

I just need to get my XP to function properly with my Cakewalk, other than that i adore it. It is well worth the money, and i don't think Triton will make THAT much a difference to you, seeing what kind of user you are. Save the money and buy two synths instead, is my advice. Among them, the XP-30.