If you are married for more than 2 years at the time your husband is granted permanent residence then he will be issued a permanent card. Your immigration status (LPR v. USC) is irrelevant to the determination.
I would think long and hard about waiting to apply for your husband until you become a U.S. citizen. While you may not foresee any problems with your naturalization application, I have seen many instances where an application for naturalization is denied and the failure to have previously petitioned for the alien spouse is quite detrimental due to loss of all the time that has transpired which could have been included had a priority date been established.
Jeffrey A. Devore, Esq.
Board Certified Immigration Attorney
Devore Law Group, P.A.
2925 PGA Blvd., Suite 204
Palm Beach Gardens, FL 33410
Telephone: (561) 478-5353
Facsimile: (561) 478-2144