I'd personally say low $xxx, or high $xx. The 'a' prefix isn't particularly good (given that it actually exists in words as a literal prefix with a meaning, such as 'theist' and 'atheist' -- essentially meaning 'without'). From that perspective, it's not particularly good. Further still, the fact that you feel the need to camelcode the name (aCoder instead of acoder) further alludes to this: the "acoder", non-camelcased spelling isn't particularly clear in the separation of the words 'a' and 'coder' -- also evident in the pronunciation. Another reason is the diversity of websites related to coding -- you want memorable, brand-able names such as 'daniweb' or 'catswhocode', not 'acoder'.