Low poly is nice n clean as gster stated. But one thing is puzzeling me...

Are you modelling a low poly one and high poly one at the same time? If so, Why? (not being cheek, just curious as to why)

Why don't you continue with the low poly and convert to Sub-D to generate a really smooth nice model. Then your free to add detailing and refine the design, if need be then convert back to poly. Only my opinion and you can tell me to stuff it :p