I picked up a set of carlyle metric long hex sockets for around $25.00 a few weeks back. They seem to be holding up well and if any break I can take them back down to napa and have it warrantied out. The same set I bought is showing on sale for $26 if you don't have an account with them...
I just picked up a set of kobalt from Lowe's for 9.99 each, metric and SAE. They seem to be fine and come on plastic socket rails. They look identical to the gearwrench sets and both are made in taiwan.
We use the 980hs at work and if it sits for awhile the solenoids inside tend to stick. We tap the valve body lightly and it will usually free it up. Also make sure all your electronic valves are plugged in, or better yet unplug and replug all of your electronic connections. Make sure to check...