Like other said, musictoyz, analogman, keeley
On harmony central you can read what millions of others thought of guitar pedals, but I often disagree.
Also check out
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http://www.ultimateguitargear.com/reviews.htm
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http://www.legendarytones.com/
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http://www.amptone.com/
They all have a good return policy, with Musictoyz you can shoot out many brands (though truthfully with musictoyz I've had to call Ted a few times to remind him to refund to my credit card). Order five fuzz pedals and shoot them out.
I've tried out a million boutique effects - you REALLY must try them yourself, and ESPECIALLY try them in a mix or with a live band.
For instance, I got a fulltone distortion pro, sounded cool at home, when I got to band rehearsal it sounded like complete ****.
The fulltone 69 sounded cool by itself, but in a live band or mix situation, my analogman sunfuzz blew it away.
For what it's worth
my recommendations in
1. Clean boost - klon centaur, BJF baby pink
2. Overdrives - hotcake, keeley bd2 & ts808 (heard good things about landgraff)
3. Vintage Univibe (I got a nice one!)
4. Lovetone - especially the Doppelganger (not making anymore, find used)
5. Fuzz - analogman sunfuzz, vintage fuzzface (if you can find a good one, a lot suck, early ones are germanium nkt275 transistors, then silicon (bc108, etc etc, **** can't remember it's been awhile, all sound different)
6. Delays - maxon ad900, ehx deluxe memory man, vintage tube maestro echoplex
7. Wah pedals - Teese (new), vintage vox clyde (made in italy)
8. TONS of cool vintage stuff - get the analogman book he just put out to research
Other great stuff - zvex, way huge (used), boomerang looper, analogman, keeley, foxrox, even digital has its uses
Fulltone might be popular but the only one I thought kind of useable was the fulldrive 2
btw, I'm a guitarist first, spent years trying this stuff out
ALMOST FORGOT - get great cables, and even great speaker cable from amp to cabinet, makes a difference. I use George l's, though there's some other great stuff.