Out of 8 work saws, 4 are ported (9010, 372xp, 262xp, 346xp), 3 are muffler modded (562xp, 550xp, MS261) and 1 is bone stock (MS201T). The 562 and 550 will see grinders is due time. The 201 will get the low buck "wake-up" done (timing, exhaust, re-tune) and the 261 we'll see as my little brother will eventually inherit it and isn't the most experienced with a saw, let alone a ported version.... I will end up with two more in either a ported 390xp or 395xp and an older 100cc+ monster and then I'll likely be done.
Could I live with stock saws, yes. Would it be nearly as entertaining and fun as ported ones? NO! I like the additional throttle response and chain speed of the modded versions, though the best mod for any saw is a clean air filter and a sharp chain.