Top handle would be a t540xp the first week in use. Now starting to enjoy the echo 355t since putting a 14" on instead of the 16". Big difference! 562xp would be my favorite felling saw until the wood gets too large. Then would be an 066 when available!
I like my echo 355T with a 14" bar. That saw screams through limbs, it is perfect for drop cuts. On the ground my echo CS-800 is a work horse. That saw with a 36" bar has opened up a world of opportunities for me. It also has a really nice power output. Only downside is the weight.