FM Acoustics fm155 preamp

Currently I use a Lamm LL2 preamp with Wavac EC300B power amp. The plan is to replace the Lamm preamp with FM acoustics preamp which will drive the Wavac. The next step possibly is to get a Pass Labs F6 to replace the Wavac since I need more power, keeping some of the triode sound intact. And finally I may or may not upgrade to the FM power amp depends on how good the Pass F6 turns out.

totally different sound...Lamm and FM, you probably know, but it will still be some head scratching for you. But it is in the same "level" so you should be fine with the change of character if you are looking for that.

One is SS, the other tube. Sound completely different.Only you can decide what you like unless you are in to collecting brand names.

The Lamm LL2 sounds definitely more lifelike than the FM Acoustics. And the Wavac 300B is an excellent Design. I think, that combination is great. No 300B has the ability to drive conventional speakers, They are not made for that. They are super with Horns. When you still hold your Westminster speakers, believe me, you will never get the triode sound with these. No way. You will always get an impression but never the full monty. They play loud but that's it. None of them is able to deliver the miracle of the sonic fascination which is in the first watt...
Good luck :-)

Yeah, FM sounds better with preamp and amp together. Plus, I suggest you use their interconnects and speaker cable.