i think the sabddi or mxr m-80 should only be used if ur lgonna be using the preamp and distortion. for the same money, you can get better distortions and better preamps (like the aphex). all this imo anyway.
prefer analog individual pedals. just go out and try and try and try and then buy. if it's 2nd hand i guess you just do your research, pay a decent price for it and if it doesn't work out, sell it for about the same price you bought it 2nd hand.
to start off i'd say chorus, od and filters are good first choice pedals as it adds to diff aspects to your playing and can be used relatively often enough.
eh superkicky, remember to record your wooly mammoth. ace paint job man.
what do you use your line selector for? and can elaborate on the differences between the blues driver and the bass drive? thanks!