G,day Inkswitch, welcome to the community
First good quality eyepiece? Thats a very personal question. We all have our interests and observing requirements. Something like a 25mm-16mm plossl would be ideal particually for deep sky observing (which is my interest) A high quality one from Televue or an LV from Vixen wont let you down. A lot of people on this forum will offer you lots of advice, most of it good
so be patient and tread carefully.
Cheers, Mick