Why only those two choices? If you search this forum using the search term "Pulse" you'll see all kinds of information about new and used kits in the $500 range (just skip all the search results related to
pulse, as in timing).
The one recommendation I see coming up time and time again is the
Pearl Export drums -- many models on the used market via Craigslist for example. They sound good and are well built. Someone wrote that they last forever. They would be used because
Pearl makes the Vision series now, but they'd be a great choice.
My worry about
Pulse drums is that when you eventually want to trade up to a more professional kit some day they wouldn't be as easy to sell. But by then you might just want to do a good deed and donate them to some needy beginner!