Solomon Lusk,
What monitors you get depends on quite a few factors. How big is your room? What is their placement in your room? Are you a producer or planning on producing in the future? Whether you need a subwoofer or not also depends on those monitors. If they’re a nice size in comparison to your room, they may already have enough bass.
Do your believe your current M-Audio monitors are good enough? Do you really need new monitors? I don’t have any experiences with their monitors…so maybe someone else can help you out on this aspect.
Are you getting gigs and such? If you have cash to burn, sure…you could get those monitors, but if not…waiting and spending quite a bit on great monitors that will last in the long run would be your best bet instead of getting halfway decent pairs of monitors here and there for a lower price.
I currently have Yamaha HS8s which run from $300-$349 each depending on where you look, and I have a somewhat small dorm room to myself, so a subwoofer for me would be overkill…to me and my neighbors. Of course they have 5 and 7 inch versions in addition to a subwoofer in the same line of monitors. Hopefully this helps…maybe someone can add on.
-Caravel