I may or may not have just listed my 250 for sale in favor of a 300 or 350. Don't feel like wasting my energy picking up a 450. A 300 is 5 lbs lighter than my bike, a 450 is 10 lbs heavier, and a 350 is 4 lbs heavier. If it doesn't sell for close then I'm till happy with my bike. I set the price pretty high so it probably won't sell.
Easy solution, just don't wreck
FWIW, the 300 will likely feel way lighter than your current bike while riding. Reason being is the weight is down low vs. having all the valve train a 4T has up high. I love my 500 and wouldn't trade it for a 300, but I wouldn't hesitate to own another 300.