Rem 243 tubes are often very usable for a factory tube. In the end, it doesn't matter how much you spent, but how small your groups are.
Sometimes a little tuning by someone who knows where to tweak can turn something average into something great. Make sure that the forend is floated and rock on!
I get a kick out of rifles I am into for less than $500 shooting as well as the $5k rig in the next lane...must be all that extra Krylon I use...:)