I have had a Trace Elliot AH100 since 1989. It started life as a regular AH100 bought from the Bass Centre in Wapping. At the time I played in a band with a guy who worked at TE, and he gutted the amp for me and replaced it with a prototype they made for a big rock star endorsement (the guy rejected it - his loss was my gain). Since then it has been shipped across the pond and converted to US voltage. In all that time, it has been repaired only once. I run it through a Laney 4x10+1x15 with Fane speakers (also from 1989). I play pop, rock and metal. Slap, pick and fingers. 4 string, 5 string and frettless. All in about equal proportion. The amp sounds ok, but it's very sterile and not very loud - I can hear myself over a drummer and 2 Marshalls but I need both cabs and I need to play on 10. It's time for a replacement. I am looking for suggestions based on the following requirements: * Made in the USA or UK - I want my hard earned dollars to benefit my people (I am a dual citizen). Korean Ampegs and Chinese Ashdowns don't count. * Around 500W @ 4 ohms * Hybrid tube/ss technology - I like the sound of tubes, but not the 'bother'. * The amp must look like it belongs on a 4x10+1x15 stack - so no silly 'lightweight' amps (like Shuttle or Superfly) * Price is really not an issue, but I'd like to stay in the $1-$2 per watt range if poss. My shortlist right now is as follows: * Ampeg SVT 3 Pro (used) * Ashdown ABM EVO II (used) * SWR 350x or 550x * Trace Elliot AH-500/600 * Mesa/Boogie M6 Carbine Is there anything I missed that I should consider ? Does anyone have any recommendation about what to choose ?