I have an old Husqvarna 345 and I'm very happy with it. I believe the 300 series is like a semi-professional lineup. More than good enough for home use. Decent gift for someone who thinks they could use a chainsaw, but isn't a professional lumberjack that knows exactly what type of saw they need.

Of course the 345 is no longer being sold, but basically get 'em something in the 40-50 cm^3^ range roughly, to get started. Husqvarna and Stihl both make great saws.

Yes, I love chainsaws.