Arc mini 125.4 would be my choice all day long and twice on Sunday. I've heard both the Arc's and the PDX amps and the Arc's are WAY ahead of the Alpine's IMHO.
I got a LP 4253 BLUE if you were interested
I've never noticed any issues with fan noise from any of the mini's.JL HD
How's the little fan on the Arc mini. Can it be heard if you mount it under a front seat?
I've never noticed any issues with fan noise from any of the mini's.
And yes, LP amps are AMAZING!! Don't get hung up on low wattage ratings. In the case of great amps like an LP, I wouldn't hesitate to use it. Just my .02.