Preferably I'm looking for a one-click buy option, but am willing to invest more time/work in it if needed. I'm not looking for something super powerful (dunno if 1 block/month is asking much ).
Oh, and also, heard some about ASIC, have anyone tried anything from butterflylabs? or, in other words, would this be a good buy http://products.butterflylabs.com/homepage/4-5gh-bitcoin-miner.html ?
TL;DR power consumption is of no concern, need help on finding a mining rig.
forget about ASIC as it's not generally available yet.
If you know how to build a computer, buy a motherboard with 4/5 PCI Express slots, buy a cheap processor Senprom or similar, buy a nice PSU 1000/1100W, buy a cheap case (if you want to have a clean setup), buy one stick of RAM 2/4GB will do, and buy three Radeons 7970, you don't even need a HDD nor a DVD Drive... just install linux, setup the AMD Drivers and use CGMiner or something like that.
with about $1100 in investment you should be able to get abour 2000Mhash/s and collect about 7 BTC/m at current difficulty.
that's almost $200... If you like free money, then buy another rig, but watch out because someone's power bill will increase considerably.
Good luck!