TL;DR Version: Tech 21 VT Bass 500 or Ampeg PF-500? I have 3 rigs I use: 1: Ampeg SVT-VR, both channels bridged through SVT 8x10. Lots of mids, lots of warm tubey goodness. Not a ton of grit. Just a bit. 2. GK1001RB-II, through an SVT6x10. I run the low-mids & hi-mids a little high, and I can get this to sound pretty much exactly like the SVT-VR. Maybe a little more dirt. My third rig is just the GK through an SVT 4x10HLF. This is simply a smaller version of #2. Is there a Class D/Micro type head that will capture a similar sound, running through the SVT4x10HLF? I was looking at the Ampeg PF-500 and the Tech 21 VT Bass-500. I don't need a super-powerful amp for this rig. This is more of my "super portable/small venue/backup" rig. I don't really need a DI for this rig. I'm just looking for something nice & small (and light). But I need enough headroom to push the 4x10, and hopefully with the same sound. I rotate 4 different P-basses through this rigs, all with the same pickups (Fender '62's). All four basses cop the same sound. Oh, I've tried the GK MB series, including the hybrid/fusion, and could not find a warm, tubey sound with them. They were all too "modern" sounding. And yes, I know that no Class D amp is going to perfectly replicate the sound of tubes. I just want as close as possible. So besides the Ampeg & Tech 21, is there another micro head I should look into? I know there's a lot of love for the Tonehammer & Mesa Subway, but I'd like to keep it around $500 if possible. Between the Ampeg & Tech 21, is there a winner? Nearest GC is 100 miles away, and they don't have the Tech 21 to try out. EDIT: I listened to a ton of samples on YT and found "my" tone from the Ampeg. I'm just worried about reliability, from all the horror threads about those things. Thanks in advance. P.S. - Yes I know the 410HLF is a beast and I eventually need to get a much lighter cab. That's in the future.