For about $70 bucks, I don't think you can buy a sturdier stand than "Knox Gear Z Style Heavy Duty Adjustable Piano Keyboard Stand". Looks like Amazon is sold out but you can still purchase from a 3rd party.
I have a similar one of these: Neewer Collapsible Piano Keyboard Stand. and it's pretty sturdy. I now have my new PSR SX700 on it. But either one should do nicely.
I don't like the X types either as they don't seem very sturdy, plus you can't put anything under them. I have a Logitech Z623 2.1 System (one mentioned here somewhere) with subwoofer, and the woofer is underneath. With the subwoofer on one side and the piano bench on the other, it works out nicely.
PS. I don't know if you're allowed to put links here but to be safe did not. You can look them up at Amazon.
Hope this helps