I also use Castrol DoT-4 fluid. LMA = Low Moisture Activity, that is, it's much less hydroscopic (absorbs less H2O) than standard DoT-3, which means less chance of internal brake corrosion. I think it's the best cost/performance compromise.
I've also used silicone fluid, but didn't think it was much better for the $$. Also, if you switch to silicone you'll have to remove all the old DoT 3 or 4 fluid by flushing with alcohol.
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[color:green] '67 cpe, daily driver </font color=green>