Dude.... I am in almost the same boat as you. I have an XV-88 and use it in a praise band. It really is a good keyboard and I love some of the Piano/E.P./organ sounds (Great for praise and worship) but I don't think it would be worth it for you. You said you have an XP-80, QS8, and Triton right???? I don't think the $2000 for the XV is worth it if you have all that already..... unless your just looking for a good 88-key master keyboard, or if you just have a lot of money to blow. I would say to try some sound modules..... this will cut down on the space you would need to set up. You could then use your XP-80 to control the sound module....... If you like the sounds on the XV so much, why don't you consider getting an XV 3080 or 5080 module???? For almost the same price as the XV-88 you could get either the XV 3080 and another cheaper module (NanoPiano, etc.) or get the XV 5080 which would give you all the sounds from the XV-88 with even more expansion slots and the ability to read samples....... Either way you go (The XV-88 or a sound module) you will still have to have either the XP-80 or Triton with you anyway, if you use the sequencer that is. The XV-88 has no ability to play midi files on it's own and has no on-board sequencer. Hope this helped some. If you do decide to get the XV.... go ahead and post back with any specific questions you have and I'll do my best to answer them.
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John 3:16 For God so loved the world, that He gave His only Son, that whoever believes in Him should not perish, but have everlasting life.