Alright guys, I've been coming here for quite some time and have gotten great advice and I have learned a lot, also. I need help. A dealer close to me carries both Husqvarna and Dolmar. I need a good 50cc saw, so I am looking at the 550xp and the 5150. From what I have read, they are both great saws. Here are my concerns: on the 550xp, how is the reliability of the autotune feature, any major problem? Parts availability for the 5150. The dealer said that even he sometimes had to wait a week or so on parts for Dolmars (he did say that may not be the case for all dealers, but it was for him). the weight of the 5150 also is a little more than the 550xp. Is the 550xp worth the extra $90 over the 5150? Also, I realize there are many fans of other saw brands, but these two are what would work best for me. Thanks for any help.