Well, after reading Smash's excellent review of the Carvin B1500 I am contemplating the junior brother to this amp the Carvin B500. However, I am also seriously looking at the Genz-Benz line specifically the GBE 500H. The wattage is about the same: -b500 350/500 at 4 and 2ohms -gbe 500 is 400/525 at 4 and 2ohms. The weight is about the same. I will be driving this amp almost always with a 2 ohm load with the pair of wizzys I intend to buy. I have one wizzy already. Looking for another. The main reason I am looking at the GBE 500 is that the wizzy is actually slightly less than a 4 ohm cab. I think I read that it is 3.87 or something. This means that I will be asking the amp to run slightly lower than two ohms and that has me a little concerned. The GBE series is apparently better suited to this than the b500 because it has a large heatsink as well as a fan. The website says you can run it at 2ohms all day. However, that isnt to say the b500 doesnt do 2ohms stable either, its just that GBE is being touted as very stable. After reading Smash's review it is my assumption the B500 probably has a better build and sounds like a great amp. From the descriptions I have read of both amp I am pretty sure I will be satisfied with the tone of either. Other points: - I can pickup the b500 for about $100 less (both I am looking at are used) -the b500 has a 1 year parts and labour warranty. -the b500 has a more simple layout which i prefer. -the GBE has a dual preamp 12AX7 (?) and FET I keep coming back to the 2ohm load being "probably" more stable with the GBE. What would you buy in my shoes?