Being a dealer for Husaberg, I have both 450 & 570 and have done a fair bit on both. Wow! Everything you've read is true, but until you ride it you don't seem to understand. The 450 feels super light, almost 2 stroke light and the 570 feels like a 250 four stroke with heaps of power. The 450 is awesome, the 570 is F&%ing AWESOME! Fair enough I'm biased and have a vested interest, but anyone who is looking for a new bike should at least ride one before they spend their money. If you are in Victoria and want to ride either or both, look me up. I'll take you on a one of four loops, 20klm, 55klm, 75klm or 98klm.
I haven't had a chance to ride my VMX bikes though. The CR390 has gone to a good home and will see the track with a new rider this year. My '74 Mag 250 and '75 GP360 are undergoing race prep for the coming season, as are our '81 KTM 420 (my mechanics sonsored ride) and '73 Husky CR250 (mates sponsored ride). Looking forward to a good fun season.
Cheers,
K