My wife says yes Help what to upgrade next?

Well, I wouldn't be upgrading the wife, for sure.

I used to own a Miles and I liked it a lot. I would also recommend upgrading your power and cables. For interconnects and speaker cables, I recommend trying Harmonic Technology, which I have had good luck with. The last thing I would do is buy a preamp. I also run my CDP directly to my amp and have found that choosing your amp in this configuration is critical. If you get to the point where you are going to buy a preamp, just think of the amp you could upgrade to with that money!

I have used an Aragon 8002 for years and has been extremely happy with it. But, eventhough the 8008 is the more expensive amp, the 8002 is more balanced and musical. What I mean is, the 8008 is boomier in the lows and sharper in the highs.

The BnW 802 can sure benefit from the extra oomph the 8008 provides, but its metal dome tweeter can do without the sharper highs. This is probably why you prefer the Monster Sigma being they are mellower sounding cables.

You probably want to get a new amp and powercord for the amp and especially for the cd player.

Gretchen, I use the 8008 too and I found that it works very well with the Krell KRC 2 pre-amp. The sound with the Krell in-line is better than without it. For what it's worth if you can get your hands on the pre-amp, try it!

I was going to say this

You should mention what about your system you would like to improve on... what do you like about the system. What would you like to improve.. bass response, accuracy, depth, soundstage... vocals, higs anything... 

But then I saw this

 I have not upgraded to PC's they are stock.

And so the correct answer is this

1)  aftermarket pc's.

Your freebie rubber power cords are the worst thing you have. Monster runs a close second. Try power cords, interconnects, and speaker cables priced far above whatever you think might actually be worth buying. Not because that is what you should buy, but because that is the way to learn and understand such things actually are worth buying. Once you experience just how much difference these things can make, only then will you be in a position to determine what and how much you think is worth going for.