John,
Technics used to be a much better deal for you than for most of us in the USA.
Besides, Korg had a higher price here because of high Euro, and now they have jacked up that price even more because of the same high Euro. If this trend continues, those of us who want to buy a Korg will have to pay an arm and a leg (and 20% of another leg)
The arguments that the manufacturers (and some of the dealers) make is "look how much more you are getting - an MP3 player for $300, a CD burner for $500, a hard drive for $600... surely this makes a [insert name here] a good buy at only $4500"
This argument is flawed, and I don't buy it for a minute. A $15000 car would cost around $75000 if you had to buy all its parts piecemeal. Yet none of us would think of paying $75000 for a cheap car. If the cars were that unaffordable, we would not be driving, but walking, biking, riding a horse, or whatever else people used to do. In other words, if the car makers had tried to gouge us too much (some will say they are doing this already), people would not use cars as their everyday mode of transportation. In other words, the manufacturers' greed would be hurting primarily themselves. Of course, it would be inconvenient for the public, but it would kill the profits of the car makers. Yet, the keyboard makers are operating in exactly the same mode - charge what the market can bear and then some, because we can.
I believe that today any major keyboard manufacturer - Yamaha, Roland, Korg, Emu, etc., is able to build an arranger keyboard relatively inexpensively - the sound generation technologies of all the major makers are sufficiently high to be able to reproduce natural instrument sounds, which is what most of us look for in an arranger.
The arranger functions are not overly complicated. The only advantage an established manufacturer has is the ability to re-use their operating system, as Korg and Yamaha and GEM are doing. I believe the fact that Roland has never nailed down the kinks in the operating system is what is biting it in the ... now, but given the wealth of public experience, anyone can design a good operating system without too much trouble. For the most part, it is a packaging exercise, reusing the same technologies and parts they are using in the rest of their product lines.
Ultimately it comes down to giving the user some extra convenience. I have been using arranger keyboards for the last 14 years, and can attest to the convenience of having an all-in-one instrument, which can allow to to express myself musically at the push of a single button.
However, in the absence of an alternative, I have almost resigned myself to going to a two-box solution - a laptop and a keyboard controller. One thing for sure - I have seen plenty of slab pianos with long keyboards and speakers, which I would love to play instead of some dinky spongy short keyboards found on some of today's even not-so-cheap instruments.
Regards,
Alex