The best replacement for k7 is k5.

The best alternatives to k7 are rated as following:
★★★★★  k5
★★★★  k20d
★★★  kx
★★★  kr
★★  vector
★★  mtar x
★★  bizon
★  k30
★  cbj
★  k5 pentax
★  k8
★  pentax k5
  mtar
  pentax kr
  k6
  kx pentax
  k20

Your alternative for k7 is not listed? Suggest!
Speaking about k7, one probably shouldn't forget about manual lens.

Other search terms related to k7 and their ratings are:
★★★★★ manual lens
You have in mind a companion for k7 and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of k7 in all years. Click on graph for more.
k7
k5
k20d