I had to read about SPG Lux again as well! I have SPG cards but no Marriotts so I’d consider upgrading to it if they had a decent offer from my current SPG card but now that I’ve reviewed DoC's write-up on it I remember why I forgot it!
$450 AF
woah- this sucker better come with some kick-rear benefits...
$300 in Marriott credit per cardmember year
umm, ok I don't plan on spending $300 cash at a Marriott but I can adjust if I get a good deal from the rest of this
Gold Status
guaranteed upgrade is nice, breakfast and lounge have a bit of $$ value but only good for 2 people
15 elite nights (under the only once per Marriott account rule no matter what cards you have)
have it with my SPG cards
Priority Pass (unlimited visits, 2 guests)
have it with CSR (and AR and Hilton Ascend)
Boingo Internet (not inflight)
What? don't care...
Global entry/TSA
have it with CSR and AR
Conclusion