Dont want to spend a fortune but probably will needs to take my d200 fitted with a grip and sigma 105mm, also is worth adding a focusing rail?.
I second the Benbow .
its like playing the bag pipes setting one of those up, legs all over place 
I use a Manfrotto 055XPROB which does the job for me with a 5d mk III and Canon 100mm macro lens. It 'articulates' which is handy for macro:
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For focusing on macro I tend to tether to my laptop and control it from there.
nobody mentioned Giottos MTL9351B or Giottos MTL9361B with Giottos MH1300 Head ?