Doofus:
Your husband is a tall & light-ish guy, and should have no problem fitting any of the "high racer" type bikes. For long rides at a good pace with relatively little effort, I'd recommend a Bacchetta Giro 26/Corsa or a RANS F5. Many find the speed addictive, although high racers can be a bit tricky to master for first timers (must relax both arms). But I'd say have your husband give it a go and see how he likes it.
As for the Bella, Stratus, and similar long wheelbase (LWB) recumbents, keep in mind that they can be hard to transport because of the overall length.
Keep us posted about what your husband finds interesting.
Last edited by Recumbomatic; 07-04-15 at 12:15 PM.