He grins round at both of them. "Sounds like a plan!" He winks at Ianto. "Got a few places I can think of to show you too - especially if I can get the time travel function on my wrist strap working again!"
The more he thinks about it, the more excited he feels for their future together. Spike is only a very recent addition to the plan of showing Ianto the universe, but the idea of all three of them heading out together, not only for sight-seeing but to tackle the task of getting Spike his soul back first... yeah, it's exciting. He grins. "Feels a bit like when I started out with the Doctor and Rose, this. No idea what's coming, but that's what's exciting about it!"