Hi everyone!

I'm new to Bitcoin mining, and I was checking how can we mine faster.
Discovered two main mining rig/ASIC manufacturers: Butterflylabs and BTCFGPA.

Which one is better? I mean, are their hardware reliable? Can they fry with the processing temperature, or so?
And the most important question of all: Can we trust them?

I'm asking this because I just saw a post claiming that Butterflylabs new 1,500 GH/s ASICs are a scam: https://bitcointalk.org/index.php?topic=114329.0
Are they?

What about the 30 and 60 GH/s ASICs? Do you think these are a scam too?

BTCFGPA also have some 27 GH and 54 GH/s ASICs, but are they worth it?

Also, the prices seem too high for a piece of machinery, and the profits of mining are always so low.
With the difficulty increasing all the time will an investment like this ever pay off?

Cheers!