The best replacement for broadcom is atheros.

The best alternatives to broadcom are rated as following:
★★★★★  atheros
★★★★  qualcomm
★★  marvell
★★  intel wifi
★  intel wireless
★  realtek
★  killer
★  trendchip
★  mediatek
★  nxp
★  intel nic
  entropic
  emulex
  csr
  adreno
  mtk
  ralink
  lantiq
  exynos

Your alternative for broadcom is not listed? Suggest!
Speaking about broadcom, one probably shouldn't forget about aircrack.

Other search terms related to broadcom and their ratings are:
★★★★★ aircrack
★★★ airodump
You have in mind a companion for broadcom and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of broadcom in all years. Click on graph for more.
broadcom
atheros
qualcomm