Good thinking Jonny, but I've criticized the E-X series before for not being "real" Rolands.

As might be inferred from the .STY file extension, a thorough review of the E-X series owners' manuals shows that these keyboards use Yamaha's(!) style control parameters and chord fingering. I concluded that they're entry-level PSRs in everything but name. (Hopefully unlike Medeli, Roland actually paid Yamaha for use of their hardware and software!)

The Casio CT-S500 is the only current entry-level keyboard I would consider. Even then I recommend that folks spend a little more for a used BK-5 with Roland's own Style Composer built-in, which is more capable than the crummy software Vangelis asked about.

If someone on this thread actually owns an E-X series, it would be interesting to find out whether they are capable of playing "legacy" Roland .STL styles from the G-70 or even the older 2-variation styles from the G-800. I'd wager a lot of money that they cannot.