Hi!
Recently i had a chance to try the demo model of the 2600 which was placed right beside a 1400 (i'm currently using 1400). At first glance the silver finish on the 2600 made the 1400 looked so 'old'
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There were a lot of people trying to get their hands on the unit, so i had a short time trying out the 2600.
The playing feel (keys and button access) are the same IMHO. I like the 'octave change' feature which is always active on the screen - makes changing octaves very easy and quickly. The board felt lighter and there is no Line In at the back. The overall layout does not really give any 'new' feeling except for the silver finish and the glossy SD slot - it's like playing a 1400 with better sounds & styles. I find the layout on the operation screens looked better.
The price for both the 2600 and 1400 are very close with 2600 tagged RM300 higher. So apart from the sounds and availability of styles, the SD card technology would be the driving factor to upgrade to the 2600. Without the floppy drive, especially for 1400 users, the transition to 2600 would be tedious (IMO) bcoz additional stuffs would need to be included eg. pc / laptop & sd card reader.
I will keep my 1400 for the time being.