I think the new arrangers are wonderful bargains. I have paid more for a vocal harmonizer than the PSR2000 costs.
Just think, you get several DSP processors, vocal harmony, compressor/limiter, sequencer, digital mixer, midi file player, screen with musical score, and many more features. Just try to assemble all those components seperately and see what they cost.
Sure, I wish they were less expensive too, but the companies have to continue research and development so they can sell us a better one next year!
DonM