I have a fustaba radio and rx... spent under $100.00. You don't need digital trims unless you are using a digital servo....
My advise is to get a Hi-tech hs645mg steering servo... 130 oz only about $45.00....... the other is fine for throttle... Please make sure you replace the rx battery pack with a 5 cell rechargable... Venom makes on about $25.00... last a very long time.....