for future levels you will want to buy the pants that will be added in the future tombolas.
for example, the best dueling sets today are John Wesley Hardin (ranged) and Butch Cassidy (melee) sets. but we will have an Independence day tombola soon, then the Oktoberfest tombola, Day of the dead etc. etc..... and sets we have as "the best" today will be obsolete in the same way that Doc's set or Cullen Baker's set or Pinter's set or Bill Doolin's set (and many others) are practically useless today.