Sorry, James, but I built a pretty extensive library for my K2500... most of the TOTL Kurzweil and Akai libraries, including a lot of custom breath controller stuff, and have it tweaked to death! It still impresses most of my clients, and, in all fairness, was the basis of MANY, many hits from the nineties that still impress to this day (not that I played them, but the Kurzweil did...!).
You see, for me, it's NOT about having the latest greatest. It's about having something 'good enough' that I am intimately familiar with... That being said, I do agree that there are more sophisticated tools out there, and for pure synthesis, the old K2500 has long been surpassed. But the list of players WELL out of our leagues that still continue to play them is long and storied.
Hollywood scores were recorded on them. Countless hits were recorded on them. That's good enough for me.
If I need anything past its' capabilities, then I've got quite a few VSTi's for synth stuff (big fan of much of the Arturia stuff) or I can use Kontact, etc.. But my primary library was built in the nineties, was TOTL for its' time, and still satisfies most of my clients. Hollywood comes knocking (fat chance!) I'll run out and get the latest greatest... Until then, what I have does the job!
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An arranger is just a tool. What matters is what you build with it..!