hi there, I have 2 amps that I'd like to try the hartke HA5500(519 euros --> 704.982 USD) or the hartke LH 500 (333 euros --> 452.329 USD) and use them with 2 hartke ak speakers. they both have 500 watts power handling but there prices are very different (I can offord both of them). I hear great things about the hartke LH 500 but I don't hear much about the hartke HA5500. the HA5500 has much more features than the LH 500. why does everyone choose LH 500 over HA 5500? does somebody hase those amps? does somebody have hartke ak speakers? and what is the best speaker combination 4x10' + 4x10' or 4x10' + 1x15'? thx !