I had the HT Club 40 but I found myself running it through my 2x12 cab with V30s. I like the sound that was coming from the amp. The Series One gives you alot more options.
I tried the HT-100 in a store, bought it used via harmony central, played it at home and wasn't impressed.It had a nice clean, but the 2 dirty channels sounded artificial to my ears. I just sold it. Maybe the S1 sounds more real. Who knows??