I don't think that the power level is that important for an at home practice amp. But the Pathfinder 15r has tremolo and reverb. Pathfinder 10 does not. 15r has 8" speaker, 10 has a 6.5" speaker. 15r has speaker out, footswitch jack, headphone/line out. the 10 has only headphone/line out. The 15r has got more, but it depends on what you need/want.
Never tried the AC10 but have heard nothing but great things about them. I still have a pathfinder 15r which I love. If I were to choose between the pathfinder 10 and 15r, I'd definitely choose the 15r. I found the 10 too small and gimmicky, but ok as a practise amp.
In the lower watt vox camp have you looked at the AC4C1-12? I haven't tried one myself but they seem very nice using a 12" speaker, unless you need on board been and trem.
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