For those using an FX processor there is still another way called the 4 wire method giving you best of both worlds; guitar goes to input FX processor, effects loop out on FX goes to guitar in from the amp, preamp out ( or on some amps called FX out ) goes to effects in on processor and finally FX processor out goes to Power amp in or FX loop in. This way you can use the pre amp section of your amp in different presets of your FX processor.

Herman