The spacing of your children is a very personal decision and if both you and your husband feel strongly, I would say go for it. Having kids less than 2 years apart may be challenging at first, but it can also be very rewarding. In my husband's family, his 2 oldest brothers are about 20 months apart, and as adults they are great friends still. Growing up they had similar interests, and got along pretty well. And they are both intelligent, well-educated men.
Chances are that you'll have 2 kids in diapers for a while. The oldest will just be moving out of the "terrible twos" when the younger one starts. Same for potty training (although the youngest may learn more easily from watching brother & sister). And many other developmental milestones will be back to back. Depending on timing, they could be only 1 year apart in school, too.
As far as the nurture etc, give each child some one-on-one time as well as playing in groups. Schedule yourself time with each, as well as some "you" time (you're going to need a bit of that to keep your sanity!)
Good luck and enjoy your little ones!