Radical! is a PHENOMENAL game. I love how it makes you spread your shots around the play field to collect the letters, you really need to get good at every shot. The game doesn't have official combos, but the way the shots are setup, you often have to make 1 or 2 shots to make a third. It's like a prehistoric combo system
I'm running the PAPA tournament roms in mine to take the randomness out of the jackpot. It defaults to 5 million when it's hit no matter what the display says. That makes it more fun to play against others in my opinion.
When I was looking for my radical, I had to take what I could get. In the end I got VERY lucky, but I wouldn't hesitate to spend $2K, or even $2.5K on a really nice one. I haven't seen another pop up let alone a really nice one since I was lucky enough to grab this one.
Shockingly easy game to shop, the ramps come up really easy, but you do have to do 4 flipper rebuilds and it has the extra pop bumper.
Excellent game. BTW, take those horrible plastic leg protectors off, they can do as much damage as not having protectors at all. Use these:
http://www.pinballlife.com/index.php?p=product&id=2711
or these: