Ok Lemme add on what i said last:
Originally Posted by getshorty80
1. You need one pedal for teh overdriven tone.
Boss DS-1. However, DS-1 is known to have slightly harsh tone (ofcourse you can mellow it using the "Tone" knob).
Marshall Guvnor. Not much reviews about it, but heard that it gives a very good marhsally tone.
Boss OS-2. I guess works out to be better than DS-1. With overdrive as well as distortion controls.
Tech21 GT-2 sansamp. The ultimate in stomp box. Will give you Marshall, Mesa/Boogie as well as Fender Tweed tones. Only hithc is htat it is priced sligthly high. but super quality.
AMT British, and AMT California. Great Marshall and Mesa tones. However, slightly costly option. But the tones are good and smooth. Better than Boss though.
Boss Bluesdriver. Nice transparent overdrive. Can go high on gain too. But the voicing is more like a Tweed. So you might not get a "rock" tone. However, coupled with TS-7 or SD-1, it really rocks.
2. For delay, the options are: Boss DD series, Rocktron short Timer, Digitech delay, Marshall echohead.
If you want, then SD-1 or Ibanez TS-7 Tubescreamre, or Digitech Bad Monkey can work good as a overdrive boost pedal. On their own, these pedals impart only slight grit. However, coupled with teh pedals listed above, it can make real growling tones. Especially for leads.