Definitely look into mods. I'm sick of the thin crappy tones I've been getting from stock pedals (boss, ibanez, etc), and finally got my SD-2 overdrive modded. It makes an incredible difference. For once, I'm actually very happy with the tone I get from my gear.
The classic boss ds-1 distortion is a very famous pedal, but the stock pedal sounds like watered down @*!*&#(@$ compared to a properly modded one. I just happened to play with a custom modded version of the DS-1 compared to my stock version, and I was simply blown away by the depth and richness of the tone.
These pedals are capable of far better sound than they deliver.