Noveske, Daniel Defense, LMT, BCM are all top notch but in reality a lower is a lower. As long as they are within spec they will work. These will cost you in the $140-$180 range stripped. For the most part you can choose the one that has a roll mark you like best.
Other good, lower cost options are Stag, Mega, Yankee Hill and Spikes. You will find these in the $100-$140 range stripped.
For a lower parts kit (LPK), Daniel Defense has a very good one and even comes with a Magpul enhanced trigger guard. LMT makes another excellent LPK. Try to stay with a top end manufacture for the LPK like the two I mentioned above.