What you have with Manley is simply an good match with your speakers, cos this is the key. The rest is just the rest, so, enjoy!
Tube amps offer an wonderful option and that's the tube tonality, which you can change with tube rolling, while SS amps are pretty much done, unless your pre-amp or other pre-equipment also a tube based one that can have some influence on SS power or integrated amps.
For example my CD player output have 2x ECC82 valves and if I roll them it creates some tonality change at the end, such as better clarity, extension or bass. Each tube brand have their own sound sig, where Mullards are more warm with great mids, but can loose some detail. But TUNG SOLS are very rich, but not warm, having great extension and tighter bass. All these small things make the final picture bit differently and that's why tubes are very fun, however in your situation can be quite expensive as well, cos there are so many of them in Manley:)
There are some technical things involved to, but hoping that other members can tell you more about that part.
Other than that, congrats and enjoy!
