I am not a huge fan of the goodsells, they sound more American.... great amps, just not that voxy in person... they are like the Matchless of Valco small pentode designs.... tighter, bigger, louder
I love my HC30... its a beast (as is every badcat I have ever used, especially the Wild Cat 40 with EL34s in cathode bias, yum) BUT if you seek a useable FX loop the matchless format is a HI-Z, unbuffered preamp out and power amp in on each channel, to you use LO-Z effects liker ack gear you need an external matching device like a DI and reamp package or a Dumblator/Kleinulator to get it to sound right. And any HI-Z stomps you put in the Matchless type loops need to have super short cable runs or you risk losing top end. A great trick with the EF86 fx loop is to put the amp on a loadbox and run the EF86 power amp out into a DI to add lush pentode harmonics to anything you would record direct. Its great for 80s sounds with chorus and compression straight to the recorder, but with the tone switch set for full bass its a great bass DI and I use it a lot on analog synths to warm them up too. You can even use it on mono FX returns to add sparkle, compression and maybe some grit to mix elements like mono reverbs, delays whatever... I am a huge fan of using it in conjunction with my TC X4 when mixing techno stuff. I set up a mono send, hit the X4 with the input set to low impedance and then output high impedance to the matchless EF86, dial the gain and DI back in. Adds tons of depth I can't get with plugins.
Also, Matchless and Badcat have much stiffer power filtering than even the reissue voxes, so they are punchier and firmer than an ac30 and don't give up the gooiness as easily (though you can brown them down a bit with a pair of smaller rectifiers over a single GZ34 thanks to the dual rectifier sockets)... the transformers are really overengineered too, so that adds bass and flattens the mids a bit when driving the output tubes. Different sound.... sort of like if Hiwatt decided to make a 30 watter! LOVE IT, but I have ac30s as well as the HC30 because they are only in the same camp, they are not interchangeable. The HC30 is INSANELY picky with pedals out front. Possibly the sketchiest pedal amp ever. It goes beyond tonal issues, the HC30 is gainier than vox on both of tis channels and dirt boxes have to be dialed conservatively to avoid tons of feedback even when the amp is set dead clean in 30 watt mode with the big rectifier!
another heads up, the master on newer voxes and matchlesses is good for more than just low volume dirt, it can lso be used to get punchier clean sounds by backing off the amount of gain into the power section a little thus reducing the strain on the rectifier(s).
PS: best tele sound ever? stereo ping pong slap echo into the HC30 and Tweed pro dialed in to sound as different as possible.