For home use an attached stand is OK but I don't like them for gigs. I use a Quik Lok 695 two tier stand with my BK9. I have the upper tier tilted back with a black home made shelf velcroed to it. It holds my IPad, music, notepad or whatever I need and is out of sight of the audience. Much larger than a plastic attachable music rest . Music racks and built in speakers are two things I don't like in a Pro Keyboard.
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Bill in SC --- Roland BK9 (2) Roland BK7M, Roland PK5 Pedals, Roland FP90, Roland CM30 (2), JBL Eon Ones (2) JBL 610 Monitor, Behringer Sub, EV mics, Apple iPad (2) Behringer DJ mixer