Graet, what do you mean about gambling?
like previous post, do your research , make your own decisions - in a lot of ways ASIC are a gamble - are you a gambling man?
Is there any difference about the hash calculation between using graphic cards, or ASICs?
Or just because they didn't started shipping them?
This brings me a question... 1500 GH/s is really a lot. And investing $30k seems too risky.