Well RAMSKI, you caught me sitting on a fence post on this one. I've raced a 1982 Husky WR430, 1983-84 CR/XC 500's and now a 1983 490 Maico in Florida Trail Riders, Hare Scrambles series in different years.
The Huskies had twin shocks, the Maico a mono shock. Both work pretty good once you get use to them. The Maico feels lighter and turns on a dime. The compression release sure makes it easier to start, especially during a long race and you are half worn out and don't have the energy to kick the monster motor over. For some reason the Husky was tricky to start. It seemed like every third kick produced enough spark to fire the monster up when the ignition lined up just right. If you know of someone who can fit a compression release on the 500 Husky then go for it if thats your interest.
Then again, the Maico runs strong and is a rocket. The front brake on the Maico had a single leading shoe system that I replaced with a twin front brake system from one of my Huskies.
Depending upon your ability, age, checkbook and motorcycle availabilty, either would be great to start out on. Check out the local club race information and see what class sparks your interest. Find a bike that matches you.
The real fun is being able to participate, meet new friends and go riding at different locations. The other thing is if there is a "significant other", get her involved in the sport also. You can always use a pit crew and then it becomes a family affair.