The Fantom-S has been discontinued since 2002...... so yeah, I can see it and a Triton LE in the same price range on the used market.
If you're using your computer to get all your samples..... editing, them, and all that, then you can transfer them to your LE, and put them into your music..... without adding the sampling option, that's the only way you'll get samples into an LE.
The Fantom-S has built in sampling..... the skip back sampling, which sounds like a gimmick, but it's really cool. & it's easier to see what you are doing on the Fantom.
The way the triton works with combi's & it's arpeggiator is really cool. IF you get a chance to check out how the arpeggiator & combis work together, you'd think the Rolands implementation is mickey mouse. You've only got one(which I think is the same for the LE), and you can only use it on one instrument patch at a time...... where you can assign your one arpeggiator to one combi, and it will trigger notes on different patches..... since a patch is the equivalent of a Roland instrument, you can get some very interesting stuff.