Well...depends on what kind of snare and cymbals you have now.
In my opinion, most any decent snare can be tuned to sound good, depending on head choice of course. Bad cymbals will always sound bad no matter what you do to them.
My choice would be cymbals.
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Well my Snare atm is a the one which came with the kit that is a tama it sounds terrible with the snare on so I leave it off when practicing, I have Paiste 101 and Pt3 cymbals also rubbish..
.A ludwig acrolite can be had used a little over 100 US used.There is thread on here now about silver sparkle Ludwig Centennials,and the OP is using an acrolite which sounds amazing.Give it a listen.
Steve B