The most distant object that you can see with an 8" telescope is 3C 273.
It is about 2 billion light years away.
http://www.seds.org/~spider/Spider/Misc/3c273.html
http://en.wikipedia.org/wiki/3C_273
The map below is from SkyMapPro. North is at the bottom of the page and 3C 273 is the dot next to 12h30m in the center of the map. It transits at about 2am. RA 12h29m06.7s dec +02d03m09s QSO