Re: Marshall MG100HDFX
It's solid-state. I've had the combo version for what must be 4 years now. Sometimes I find the clean channel to be somewhat stale and the overdrive to be overly-compressed, but then there are those times that I tune in to something that is inspiring. Though I must admit that on those occasions, I'm not sure as to whether the amp is inspiring me or if I'm inspiring it.
Obviously you should try to play with one yourself, but from my personal experience, I think it's a good amp. I think it cost me $429 new. Worth the money in my opinion.
PS: The on-board effects are pretty fun, too! You get chorus, delay, a combination of the two, and a flanger. Reverb, too.