If an extra pound or two doesn’t bother you and you have dealer support, I would go with the 6400. ($420) That sounds like a good buy!
You get .4 more hp with a gain of 1.3 lb. in weight, and if you ever want you can slap a 7900 piston and jug on it for even for another 1.5 hp with no weight gain.
Or you can just buy a 7900 for around $130 more than the 361 or about $100 more than a new 6400 or $260 more than the 6401 price you got.
I recently lost all my saws in a fire. That gave me the oportunity to try something new. I bought 1 Echo, 1 Stihl, 1 Jonsered and 1 Husqvarna. If I had to let one of them go there would be no question, it would be the Stihl. The Echo is the nicest saw to run, and quite frankly the Husqvarna/Jonsered will outrun a Stihl anyday. I have been around saws for 30 years and have yet to be converted to the Stihl camp. Sure, they make a decent saw, but I want performance not great marketing. I don't mean to bash Stihl. For those of you that like them, keep buying them. There is no better value than a CS2153 and a CS2171 or 346xp and a 372xp in my opinion. I have yet to see any saw by any manufacturer that can compete with either of those 2.
This saw looks pretty competitive to the 372.
I got these numbers off a couple of this sites sponsers
Husqvarna 372XP Chainsaw with Full Wrap Handlebar (75 cc) $579.95
SPECIFICATIONS:
Cylinder displacement: 4.55 cu. inch / 74.66 cc
Power: 5.4 hp / 3.9 kW
Max RPM: 13,500
Fuel tank volume: 1.63 US pint / .77 liter
Oil tank volume: .84 US pint / 0.40 liter
Weight (powerhead only): 14.75 lbs.
Chain Pitch: 3/8"Recommended Bar lengths: 16" - 34"
Dolmar PS7300 20 Chainsaw $579.95
Model: PS-7300 Engine displacement: 4.5 cu. in.
Power Rating: 4.2 kW Power rating: 5.7 bHP
Max. engine Speed (with bar and chain): 13,500 RPM
Fuel tank capacity: 25.36 oz Oil tank capacity: 14.2 oz
Net weight without bar and chain: 13.6 lbs
Standard guide bar: 20 " Chain Pitch: 3/8 " Chain gauge: .050 "