Ok here's the deal...
I have been checking around because I want a good synth and I know that I am going to have to pay at least 1200 bucks for it. Now my question is this what would be the difference in me getting a Triton/Trinity for 1500 and up verses me getting two keyboards choosing from jp8000, x5d, xp-30, qs 6.1 or 7.1, cs2x, n5ex or a keyboard and sound module combo. I gues I am trying to figure out value is the triton/trinity line even better than any two keyboards?
And also is it worth getting a groove/rhythm box and keyboard or keybord/sound module combo.
The reason I am going on like this is because I got this er-1 yesterday and i am thinking of just taking it back and getting a xp-30 or something I can do more with ....

Having 2 instruments often gives you an edge in both available polyphony and range of sounds, even if you bought 2 Korgs. The groovebox issue depends on your devotion to dance or ambient styles, mainly. They'd leave you hanging if you wanted any acoustic or orcehstral sounds per se and their percussion sets are much more 'sytnh-y' than well-rounded.
The XP30, IMHO, is Roland's best synth in a while, all the good points and none of their convoluted OS B.S. That or an N5 offer arpeggiators, which would cover part of the groovebox territory.
If you're playing live a lot, a groovebox can offer certain advantages in wowing a crowd, but for at-home use, its your call. A Trinity or Triton offer a lot of pow for the buck, obviously, but if they go down, you're stuck until they're repaired. Then again, they ARE quite tough and shave the poodle clean in terms of their capabilities.
Subjectively guage your own level of expertise and your end goal. If you're mainly a composer, as I am, go for the big workstation. The extra voices and FX processing make the work much easier and more transparent to the writing process. No compatibility issues, head-scratching over connection weirdness, etc.
And if you EVER move your stuff around, GET A FLIGHT CASE! Your gear is a buncha paperweights if damaged in transit. SKB makes the cheapest cases that still do the job right. Their resin-based designs are airport-tough and ATA-rated. Get the one with wheel, if you can. Mind yer back!
Always try to stretch and buy the nearest-to-top-of-the-line thing you can. Better sound, greater capabilities, more options. And use speakers if you can; headphones will eventually wear your ears out. Take it from an old synth-fart, tinnitus is all its cracked up to be. YOIKS! WHAT? WHAT? Good luck!