I'm currently looking into purchasing a multi fx unit and honestly.... I'm having a hard time figuring out what to get. I was hoping you helpful and knowledgeable people could point me in the right direction. First off let me say that I'm not looking to purchase and Axe FX or anything crazy expensive like that. My main goal is just for the effects, not necessarily the amp or cab sims. Just OD, distortion, modulation, delay, reverb, etc. I plan to run them into a clean tube amp for my sound. I've been looking at the Boss GT-100, Line 6 M13, and the Line 6 HD500X. What I want first and foremost is sound quality, then durability, and reliability. I know that the Boss will be reliable, but I honestly wonder how it sounds. The last time I used that COSM crap it wasn't too great, and some of the reviews I've read about the GT-100 say that it still isn't that great. I'm leaning towards the M13 which is purely for effects(sounds like what I need), and the HD500X. My only concern is that the M13 can only use 4 effects at a time. How are the footswitches on the Line 6 stuff ? What do you guys think I should go for ?