rebuild kits

i was looking into a rebuild kit for a 2nd gen rx7 engine. ive been seeing them anywhere from 500 to a little over 1000. whats the best kit for the $$. if nothings wrong withj the motor do i only need a basic rebuild kit or amaster rebuild kit? how would i kno if i need the master kit? the best sounding deal i could find is from rotartyresources.com
basically i need to kno what i need for a rebuild and the best place to get it.

dude if your engine runs, dont worry about a rebuild. just take care of it and it will last.

it has 205000 miles