either felt or studded felt will work...studded is nice but i dont know about paying extra for it.
as far as a preference..i worked at bass pro for years..only get there top end boot..its like 70 bucks..its a helluva boot. my girlfriends had her's for about 3 years. in all honesty..if you can swing it ..get the orvis, or simms wading boots..but if you cant..ive had decent luck with my white river stuff in the past..