IMHO buying ASICs now is much akin to pissing in the wind.
If you want to invest in hardware, I suggest GPU equipment for mining Scrypt.
My $.02.

Even that's starting to show signs of becoming less profitable. Multi-coin pools are pushing up the difficulty on all the altcoins.

At the moment I have 4 GPUs doing about 1500kH and they're bringing in more BTC than my ~180GH of SHA256 ASICs.