One thing about your desire for future mods - I wouldn't bother with a bark box. There are an infinity of opinions on them but to me 90 percent of the people who say "it really woke my saw up" are suffering placebo effect of associating something twice as loud with dramatically increased performance. Spend the time instead on becoming the best chain sharpener you can possibly be and get and maintain the best bars and chains you can. That will make WAY more real world difference to how fast you cut. I lent a tree service guy a 24 year old heavily used Husky 455 Rancher, no mods, an ordinary saw no one thinks much of, but with a razor sharp 18" bar and chain he said it cut better than any saw he'd ever used. I run everything stock, I have one dual port muffler Stihl made as an OEM design for one of my old 87cc saws and like it, but otherwise spend all my spare time sharpening, not performance tinkering.