Call Nightscaping and ask their technical department to email you the specifications on those T-1000-SS transformers before you judge them any further. They are not actually 1x1000w transformers, (that would not meet the code). They are in fact a comination of 4x250w transformers built into one enclosure. Open it up and you will see 4 sets of taps. They were THE transformer in their day and will continue to work in a well engineered system for decades to come. The system design of the units allows you to load them up to 100% of their rating (some would argue because they have been de-rated to 250w) I have found no problems with voltage drop issues at the taps. The H3Os are nicer to work with of course, but there is nothing wrong with those 10yr old T-1000-SS units either. I just comes down to engineering the system properly.