If you wanted to stick to the same 60% size you could try a HHKB Pro 2. No need to buy an extra set of keycaps, although it does open up a world of Topre artisan choices.. I'm recommending a HHKP because you're not giving us much info to work with.
Are you going to use the keyboard for gaming? Do you want a keyboard with more keys (tkl, full-sized, etc.)? Would you want to try Cherry MX type switches like Greetech, Kailh, or Gateron?