Has anyone compared the amp tones in the Digitech GSP1101 with the Tech 21 sansamp psa-1? I've been thinking about getting a gsp1101 for the flexibility of amp models & effects in one unit. But I plugged my psa-1 into the Aux input of my Fender Mustang II last night, and the tones were sounding great. I'm wondering how the core amp modeled tones of the GSP1101 (no effects) compare to the analog tones of the PSA. Anyone try or have both? Thanks.