I was looking through the specs on the sub amps on both the Adire and Parts Express sites. I want to go with 250 watt amps. They both have a similar model but the Parts Express is over $40.00 cheaper. They have similar specs except the Adire has 180w at 8 ohms and the PE has 150w at 8 ohms. Is there a noticable differance between the two? Is it worth the extra money for the Adire AVA250?