I tend to agree, unless you are getting a good deal then you may want to go with the R9 270X's

https://litecoin.info/Mining_Hardware_Comparison Look here and elsewhere on forums and see what others are getting in a similar setup that you will be building, remember not to rush into this because once you buy the components it is done! And you can always be mining other alt coins than LTC by using coinchoose and http://manotechnology.blogspot.nl/p/cgwatcher.html if you prefer.

If you need to discuss anything else then post here and I am sure others will contribute.