I've got a Triton LE61 myself, I got a great deal from a guy on ebay who just bought a studio and was selling stuff off. I went in and picked it up in person for 650 bucks, fully loaded with the sampling board and he even threw in a gig bag, a couple training videos, and an SM card!
The differences betwen the LE and TR series are
1. The TR has a black finish, while the LE is silver (control surfaces are identical)
2. The TR has an SD card slot while the LE has an SM card slot
3. The TR has an added USB port
4. The TR has some updated presets
These keyboards are amazing, especially for the price range, even at full retail. They have the exact sequencer used in the triton extreme and triton studio. They have 5 128-instrument program banks (4 user banks and a GM (general midi) bank for midi portability, but with some tweaking you can open up the GM bank if you need it) and 3 128-instrument combi banks.
There is a whole system of heirarchy in the patches. There are a ton of multisamples built in (512 I think, somewhere around there). Each program can use 1 or 2 oscillators, which can each run off of 1 or 2 multisamples that can be exchanged at a set velocity (that's up to 4 multisamples available to each program). Each program also has a detailed EG, 1 insert, and 2 master effects available, as well as a highly powerful arpeggiator with plenty of presets, all of which are completely customizable (except for the first few "core" arps).
A combi can hold up to 8 programs (timbres), all of which can be mixed and balanced to get just the right sound, and each can be mapped to individual midi channels. Combis also feature a dual arpeggiator, which allows for some really crazy sounds.
That's just a few of the highlights that really surprised me when I got mine. A couple more things: All of the keyboards also have aftertouch, which is really nice if you know how to use it effectively. And the LE and TR have something their big triton brother don't, there is a category button, which can be used for quickly finding programs and combis by catergories like keyboard, organ, pads, synth, lead, bass, etc. A couple other things organized into categories that you don't see as much are all of the multisamples, and all of the effects. Also there is an audition button for programs, which plays a little riff which can be modulated in real time to test out programs as you are searching through all of the presets.
Agh sorry I didn't mean to spin off in a huge triton ad there, but hopefully that will give some useful info to bsr2002, and maybe if anyone is on the fence it might sway their decision. If anything I mentioned above caught your attention bsr, just send me a pm and I'll explain how to do it.
For $999.99 well worth the price. It has plastic sides but the rest is metal, but I have a heavy duty case for it. 
Takes a SD card up to 1GB and since I already own a KARMA it was easy editing and tweeking the sounds on it. Saving up for the EXB-Sampling board and I will be set. YAY 
anyways goodluck with your X3. If you need the manual let me know I have it in .pdf file 
