i dont think blu-ray or wireless should be integrated, many people do not want or need those things (like me) so why should we pay more so that 5% of the people that use them can have them already built in? i prefer to pay for only what i want and need, and i know many people agree with me, thats why the 360's lack of a Hi-Def format and wireless and everything else not being intergrated, becomes a selling point as were not forced to pay for something that we dont want.
granted, some people may want these things integrated, but its a very small market share, which even half of that market share would even buy the SKU due to it either being to pricey, or due to them already having an xbox
i cannot see why having wireless integrated or a 250Gb hard drive will inspire you to buy games. neither is needed to play games, and as you said you do not use xbox live, then those two things would go to waste