You have 2 relatively good and serious balls that can cover many conditions.
If you're as new as you indicate, I think, before you develop any bad habits that can't be corrected, it may be the best time for you to get a good coach to take you into the world of serious, fun and competitive bowling. The USBC, the governing body, has a coaching system in place with gold, silver and bronze level coaches. I'd suggest a Silver level coach or the local equivalent. There are many good coaches that aren't certified, but you're safest with a certified coach. They can easily take your game to the next level or two.
This is money much better spent than on a new ball. MUCH!!
Go watch some of the better handicap or scratch leagues bowlers and ask one or three of them or even ask the pro shop: who is a great silver level coach in this area. Don't settle on the first guy recommended, but ask several people.