I'm liking the SF2 cabinet. I threw in a Retropie, which was pretty easy to do. My 2.5 year old daughter loves being able to reach the controls while standing.
I'm considering a Rampage. I might try for it when I see one on sale for cheaper. I wonder why these didn't end up in Target (at least not near me). Seems like they attract a different clientele than Walmart more apt to purchase a $300 toy.
I never actually saw one in person before ordering online. According to Brickseek, my local Walmarts are sitting on stock and very few of them have lowered prices. I guess I'll keep an eye on that to see if anything lowers enough for me to consider getting another. They're fun little toys, but I don't think they're worth the msrp of $400.
I was willing to pay $300 for my first one, but seeing people get them for way less than that tells me it's just a matter of time before these come down more in price. I'd be surprised if the company is able to sustain this kind of volume in future runs. Store marking these down to 100 aren't going to be getting newer games.