I'm sorry but saying you dont need to draft linemen high and then saying the Bills need to draft Ngata in the first round is a contradiction in my book.
There is a lot of depth at the DT position. Many of the latter DT's have had injury problems or missed a year for some reason, but are excellent players.
Everybody has some success with undrafted free agents, and because of this, it doesnt mean you should wait till the latter rounds just because we got lucky with a pick or 2. You say you can find linemen later, but dont you agree that your chance of hitting on a potential star increases the higher you pick them? It makes no sense to me that you say we shouldnt draft a lineman high because we can find them later. You can find anyone later, but its extremely difficult. The players at the top of the draft are at the top of the draft for a reason.... THEY'RE BETTER