I got this one
http://cgi.ebay.com/HANNA-HI-98129-W...QQcmdZViewItem
It is very good and I bought mine for $160 so at $129 that's a great deal.
Again, nutes in soil are not needed until about week 3-4 from seed. In hydro, small amounts of nutes can be added right away to give about 300 ppm for example.