http://www.1and1.com/?k_id=6428928 for 1and1
my lil aff tag dig 
you want to have different host for your sires, few here few there for SEO side of things, all on the same class C is no goog so get about 3-4 diff hosts if you can.
Your domains all being in one spot are not bad as they come across as a top level in the end, although se may penalize certain hosts if they are knows for porn and such..