True but not everyone can wear ear buds very long . I'm one who after a 1/2 hour or so my ear gets sore.
As to the OP. I look to at least 500 watt amp. Maybe more if you're running 4 speakers. Like woody said you lose lows and high fidelity going down the road. If you can hook up a system. I'd piece mail a system together . you can do better than those kits. JMO
2010 FLTRX , Stage 1, 13" Madstad, Mono tubes, SuperShox, Heritage style bars. Alpine CDE-HD149BT,Soundstream Picasso Nano Series PN4.520 , 5X7 and 6.5 Infinity Kappa speakers
If I have to explain ,you wouldn't under stand anyway.