I really don't understand this obsession with Mac? Like I have said many times before they are nice computers, they are the best looking boxes - and yes that bin does look pretty :-) and it is probably a good improvement over the past Mac's but they are still behind.

I think a fully kitted out Mac is about $10k

back on topic

Could you give me a description as to what you have in your box and where they are connected - this might be able help you identify your bottlenecks.

All the best

Henrik