Hi everyone I'm new to the forum. So I have had a Sound Stream Picasso 5 channel for the past 4 years and it just died on me and now I'm looking for a new amp. I have been looking at the Zapco st5, Helix Dark Blue 5, Jbl ez5, and the Polk D5000. Which one should I go for? Any other suggestions are welcome. I would like to keep the price around 300. Thank you in advance, Kevin