When you talk about looking at the paternal and Maternal side, are you referring to y-DNA and mtDNA testing? If so i would recommend FTDNA, as they offer packages that do both of them and Autosomal DNA tests. However, my personal experience is that the mtDNA really doesn't offer much use. The Y-DNA testing (if you get the Big-Y) test is providing lots of detail and as more people test, is rapidly expanding knowledge on historical migrations and population movements.
Richard