Steve, noticed your post had no replies. Thought I would give you a low voltage forum that has some good information and ideas on it. I have got into some of the landscape lighting. In fact I got a customer supposed to call me back soon to make decision. I proposed using "progress" brand lighting and transformers, verses mailbu etc. from Lowes and Home Depot. Of course the price was almost doubled using the higher price fixtures and transformers. I kind of like working with them so far. Try this forum and I think they could give you a few tips. www.lowvolt.org/
One of the things I tend to differ with some on that forum, is the way to splice the fixtures. I've found that using wirenuts and silicon work better than the "pierce point" connectors. I had a call back with one of the lights I installed, and the piece point connection wasn't making good. I wire-nutted it, and have had no other problems. Hope this helps. Steve..