My first choice is /white/ because of the white double joints, and everything else white. (if only he had white rahkshi legs...)
Once I get him, I want /green/ and /black/ for pieces, but /black/ seems to have newer pieces (including a black bit from the rahkshi's back), but I've always liked green and /green/ has some good pieces (plus those claws)
I was also thinking of /"brown"/ because of his pieces, and now that I see him that it is more brown than an keetorange, I am very interested in picking him up because I really like the brown sets.
As for the others, I don't quite need them. But here are some pros and cons:
/blue/ has the trans ice blue from Toa Matoro. As well as piraka pieces from Vezok. Decide if you need those. Aside from that, the color scheme, IMO, looks horible (that light a blue on the dark blue), and you can use Lewa Nuva's Katanas instead of his/her (?) swords.
/red/ has some good parts to him, but if you have Sidorak you already have four red rahkshi legs. /Red/ seems to have the least amound of new pieces, the only really good things being his armor. If only the feet were just plain red hordika feet...
well, that's my rant, and suggestions. Look at the pieces, unless you aren't a MOCer.
So, that's what I'm hoping for. Between late Chritsmas gits, my birthday soon, and then me buying stuff, there it it.