+1 on the Cyclades (Avocent). We have about 8 of them spread across 3 data centers. We've used them for roughly 4-5 years. Won't say they are intuitive to set up, but once they are, they work well. Don't think I've seen one go down, but then again, they aren't subject to much change. Cost was pretty reasonable, but that's relative to your business/budget.