lighter wheels or just save for a lighter bike

I’ve got a kona honky tonk 2010 using it for riding to work and weekend rides… I’m running heavy tires on purpose spec armadillos.. the wheels are heavy though.. alex race 24 shiamano(r)/forumla(f) hubs

I’m wondering whether to replace the wheels with pro lite bracciano or planet x al30 (or similar)..

or just slowly save for a lighter overall bike..

the brakes are a bit of a shock coming from mtb discs… tektros, they do the job on the flat.. but downhill it takes some serious stopping (im not heavy, just tall ) .. some bbb pads have helped slightly.. but its still holding me back on the downs

thing with replacing the wheels is.. it will then move onto the brakes.. then possibly the groupset.. then it starts to get silly.. but then again just doing the wheels might make a big diff