The Orange Fuse works great in tube amps. Not as great as Townshend Pods but then the Fuse costs only about half a set of Pods. Synergistic ECT are similar.
A lot depends on what you want. The Fuse you already know will bring smoother detail and a little more depth. Orange is a nice liquid quality. ECT is not as liquid smooth, a little more detail oriented but similarly balanced. Pods are a real eye opener under tube gear, really opens it up with greater clarity and dynamics, and a nice improvement in tone. I've used Synergistic for years, everything has Orange, ECT, HFT, PHT and until recently wire too. But the Townshend reveals it to be a bit colored. Pleasantly, but even so there it is.
Hard to go wrong with any of them- which is why I use ALL of them! ;)