Just a guess here iambob (Welcome to the boards btw.) But the first thing that catches my eye, is the Power supply. Believe me when I say, you will want more than 400 watts if you want to do anything close to 10 boxing, let alone adding in a HD, DVD/blueray, etc. etc.

Even on my 5 boxing machines, I don't go lower than 550 watts, and most of them are at 650+. I implore you, do not go cheap on the Power supply.

That being said, I'm not that familiar with the i5 or even the i7 series, although they have great marks here from others. 5 boxing would be a breeze and with 24 GB Ram, that looks damn Boss. 10 boxing seems very viable, if the i4 allows it. (Like I said, I'm not sure, I know the i7 will.)

my five box machines are as follows.

AMD Phenom 9850 quad core
4 gb ram
4350 ATI Radeon
I use 2 500 Western Digital HDs and one 64 gb SSD.

I hope this helps, and I'm sure someone more knowledgeable about the Intels will be along.

Stephen