I love Exxtra and play it frequently. I'd say it's a step up from Can't Stop, but only barely. Unfortunately, it is out of print (last printed as Excape) and somewhat hard to come by.
Diamant/Incan Gold is also excellent and plays well with higher player counts.
It's a bit of a stretch to call Keltis and its derivatives push-your-luck, but I like all of them as well.
Heckmeck/Pick-omino is good, but I find it really bogs down with too many players.
Back when Diamant was out of print (before Incan Gold was released), we made our own copy. The Spawn was maybe 6 years old, and created the hazard cards. I think we are probably the only family that has a copy of Diamant/Incan Gold with a "Taco in the Eye" hazard.
Lords of Vegas is one of my favourite games and has a fantastic element of push your luck. Mechanics really give a feeling of gambling that fits the theme very well.
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