unless ya really are going off trails, and roughing it, ya dont need suspension. Get one with aggressive knobbies, and enjoy. Spend 50 to 100, and ride it til ya break it. It may never break.
I have a old Huffy, its fine. Though I bought a new Specialized Crosstown, for trails. It has front suspension. I dont need it,but it came with it. It was under 500. I enjoy my oldies more... Problem is, I see rougher trails, and im on the Crosstown, wishing I was on the Huffy. THATS why ya need a couple bikes....