I'm using a bit different set up than Flyingcamera - I use the spiral UV bulbs, but the principal is the same - get a setup that has the bulbs and ballast all together.
I would advise against getting your exposure times too short. As was discussed on another thread, these UV bulbs don't have even light output when warming up. If exposure times are short, the uneven output would affect your exposure. I think Sandy King measured a 10% difference between the first and second minute, and then the output settles down. If you have exposure ranges in the 8-10 minute range, as I do, obviously the light output variation falls to practical insignificance.
The feature that these units offer that clinch it for me is the vacuum easel.
Compared to messing around with contact frames, its the bomb.
if you are set on getting a plate burner I would suggest looking at www.tpxonline.com. This is a site that the is used by those in the printing industry to sell used equipment. I purchased a NuArc locally at a much cheaper price than what you see on eBay thru them.