SawTroll
Information Collector
Troll,
You have both the 5100 and the 346NE. What's are the actual weights of the two. This seems to be one of the major issues of the OP.
It is not really notisable in the wood-pile (about halv a pound - the original 346xp was another halv pound lighter), but it is in the woods - other handling characteristics enter the picture as well, that make the NE346xp the best option.
On the flip side, the 5100 has an inboard clutch (sort of a trade-off vs handling regarding small saws).