Some of you might think that I must be out of my mind to even consider CASIO CTK671 or even the WK series. Well, it's because the current line of arrangers are NOT acceptable to me. I would not spend more than $1500 on arrangers but then it has to have acceptable key feel, sounds, commen sense logistics of the commonly used functions. NONE of the current line up has it. PSR1000 comes very close but the key feel is AWFUL. PSR550 is actually the best so far even though the internal speaker can be better. If the CASIO CTK671 fails me then I have no other recourse but to get the PSR550 or PSR740. I already tried every other arrangers in the market that I currently have access to. I might just get a cheap arranger now to get by and then a year later hopefully something good comes up.