Re: Boost pedal
If you can, take your amp to a guitar shop and try all the pedals they have. Choose the pedal according to the amp. For example, Fender amps don't like Boss pedals (DS1 for example) because both Fender and Boss (generally) have pretty much scooped midrange. But, if you put Boss in front of Marshall, you'll get completely different picture! TS7 is mostly in mids and it works best with fenderish sounding amps. SD1 is TS-circuit based OD - creamy, midranged, soft sounding.
I have Laney LC30, and the pedal that works best with that amp is TS! Also tried Boss DS1, OD3, MXR distortion+ (this one is the worst drive pedal I ever heard!), Ibanez Jemini (both channels) and few more, but TS is my choice. The trick is to set the volume to the maximum, tone on 12 and then turn it both directions to find the best match with the amp's drive, and gain set on minimum and then slowly increase it to find your sweet spot.