I have a choice at the local guitar shop between the Ibanez promethean p3110 or the Ashdown five 15. The promethean has 10 inch speaker and 300 watts and the Ashdown five 15 has 15 inch speaker and 125 watts. The Ashdown is twice the size as the promethean. Ashdown is $50.00 more and new. The promethean is used. Looking for best sound and punch. Looking for recommendations.