only to be sure, what do i lose here when i buy the RD-700SX and sell the PSR-3000 when we talk about features?

much less styles, less instruments, no vocal harmony(Which has no use for me anyway), no lcd screen like the PSR-3000, no built-in speakers, and some other recording features, right?

I know we talk about 2 different things, digital piano and arranger, but i've seen the rd-700sx playing alots of instruments.