For the record, I have that one and the inking on it is raised and hit my clit funny and hurt pretty bad.

For cock rings in general, I would play up the benefits to him. Larger size, ability to last longer, etc. Just bring it up and say how sexy you think it would be. Usually guys will want to do something that their girlfriend thinks is sexy, especially if it makes them bigger in the process!

While 'talking about it' beforehand is always respectful and sometimes makes for great dialogue, I have also found that it sometimes it is met with said 'balking'...lol. Is your hubs pretty traditional? Self conscience? If so, you may want to simply consider reserving this gadget for a moment when you two are really getting into it. I'm no pro or anything, but I will say that a little oral lovin and some special attention might get him to relax and just lay back and see what that handy little gizmo might do for you. Dont even talk about it, just playfully go along with it and take charge. Maybe you could follow suit with the in charge part and ride 'em cowgirl. This puts little to no pressure on him. After all, what man doesn't enjoy seeing his lady being pleasured? It's super hot to a man when his woman is confident and knows what she wants.
However, if he's just not into it, just take it easy and don't stress out about it.
As far as my own experience is concerned, I have used both the Durex and the Trojan brands. I don't frequently buy them because I'm not in love with them. Sure, they're fun. But I'm not an enormous vibe girl tho.
I hope you have a happy ending on this one!

Do you use a clit vibe in front of him? Has he had a vibe on his penis?
If no to either try that 1st. Or mention to him the better orgasms you might have with the vibe pressing into you.