Looking for my first keyboard

by Terry W.L. Wong
(The Netherlands)

Hello, I looking to buy my first keyboard after playing the piano for years.

I am looking at the following and wondering if someone could give me some advice.

Casio CTK-900
Casio WK-110

Or maybe a Yamaha keyboard?

I am planning on jamming with some friends. What I am looking for is good sound, a good collection of sounds (inc. rhythm etc), PC/internet connectivity and an SD-card slot (is this important?).

Sorry if I sound like a novice that is because I am.

Thank you for your help and advice.