Interesting to look at the cost and "ready to cut" weight (no bar) between these saws:
cs800p: PHO: 16 lb, 8 oz......Fuel: 28.9 oz.....Oil: 14.1 oz......TTL: 19.18 lb.....MSRP: $829.99
390xp: PHO: 16 lb, 6.8 oz.....Fuel: 30.43 oz...Oil: 16.91 oz....TTL: 19.38 lb.....MSRP: $1,120.00
ms661: PHO: 16 lb, 11.2 oz....Fuel: 27.9 oz.....Oil: 12.2 oz..... TTL: 19.20 lb.....MSRP: $1,289.95
Edit: Don't flame me. I'm not saying the 800p is in the same category as the other saws. Just making the point that, at a certain price point, there MAY be potential.