The NucleoSpin® RNA Virus kif for isolation of RNA works very well http://www.mn-net.com/ProductsBioanalysis/DNAandRNApurification/ViralRNAandDNA/NucleoSpinRNAVirus/tabid/1336/language/en-US/Default.aspx
I had worked with qiagen, in both situation with DNA and RNA and in my opinion is a good method, you could extract nucleic acid from different source, is fast, and you´ll get a high purification in your eluted.
Here, I am going to leave the link where you could find some information about that.