a Vox da5 ;). I still own mine even in front of tubes amps. It has good on board effects that can be useful (compressor, delay, reverb that are nices) and the sounds are good for the price.
Only shame is the speaker, since youre good in DIY, you could once build a box to welcome a 12' speaker, i think it would really serve this nice little amp ;). I'd pick this one over the cube, its more natural sounding thus its digital.