sparshg

I got a Celestron Specialty Series Travel Scope 70mm which came with 10mm (40x) and 20mm (20x) eyepieces. Specifications: Focal ratio: f/5.71 Optical Design: Refractor Aperture (mm): 70 mm Focal length: 400 mm Highest Useful Magnification: 165x Lowest Useful Magnification: 10x Resolution (Rayleigh): 1.99 arc seconds Resolution (Dawes): 1.66 arc seconds I’m looking for the best possible magnifications and combinations that would lemme look at planets more clearly and up to an extent for deep sky objects. I'll soon be moving to a town-city area (Needham, MA) if that is of concern for location. Can someone recommend the eyepieces/accessories/etc. I could buy? Any other opinions? Thanks