WEBS closeout sales will be the death of my paycheck....

With two knitting projects in progress and one knitting project before the dream sweater (as mentioned here) we return to the debate about yarn subsitution for aforementioned dream sweater.
The choices as they stand so far:
1. Knitpicks Merino Style in Iris for $2.49 a ball
2. Laines Du Nord Giunco in 115 for $2.99 a ball
3. Queensland Uruguay DK in 02 for $3.99 a ball

I need about 18 skeins. Does anyone have an opinion? Please?\


(Don't make me find a picture of one of my animals begging...)