So I recently tried the new Marshall YJM and was amazed at how much the built in noise gate and booster transformed the amp. With all the features on the back bypassed it sounded like a stock plexi and didn't impress me that much, but once I turned on the noise gate I was amazed at how much it improved the amp's articulation and tightness. Once I turned on the booster it tightened it up even more. Also, whatever this boost was (probably based on a dod) i liked it MUCH better than all the tube screamer and boss sd-1 style pedals I've tried. Without the noise gate and booster the yjm wasn't that tight, but with them on it became one of the tightest amps ever. I recently just bought an isp decimator to try and tighten up my amps the same way the noise gate on the yjm did, but so far I haven't been able to get to tighten it up quite as much as the yjm's noise gate. I tried running the isp both in front of the amp and through the fx loop and got better results using the fx loop. Am I doing something wrong? Are there better pedals for what I am trying to do?