If I were you I get a new stand or dump the CRT. According to Wikipedia those speakers are classic. The Marantz is a classic as well.

Do you really think that that a Bose radio with a single 3" driver driven by a $.09 IC amplifier is going to be satisfying compared to a well designed highly regarded two way with what looks to be a 5" woofer driven by a serious amplifier?

Want a heavy duty stand? Look for a local wanting to get rid of their Salamander Synergy rack. You can fuck on them and they won't sag.