Firewire is faster but I hadly see how the signal would be any cleaner
The connection has nothing to do with the signal. However FireWire designs are generally newer designs than PCI designs, so they tend to have newer DAC designs, and their analog sections often meet tighter tolerances. The quality of computer audio gear has steadily improved, and the older designs just don't have the same quality as newer designs.
the Delta 1010 may be a fossil as you put it but there has been a whole lot of positive feed back on it from other forums not to mention it would cost me a small fortune to be able to record 10 tracks simontaneously with fire wire system...
You're kidding, right? The FIREPOD ($400) does everything the Delta 1010 does except word clock. If you're using anything decent as a clock source via word clock, you're up in the dollar range where complaining about the cost of an interface is almost silly.
Besides, the 1010 and the 1010LT are
NOT the same hardware. The 1010LT is a significantly cost-reduced version of the 1010. Among other things, the 1010LT features about forty or fifty electrolytic capacitors all over the board. Yum.
Finally, the Delta 1010
cannot record 10 channels of audio simultaneously by itself. It can record eight. If you
add an external preamp with S/PDIF capabilities (these start just shy of $300).
I probably will not use more than a 5 foot span making my connection but I can guarantee you that there is no noticable audiable difference between a 6 foot unbalanced cable and a 20 foot unbalanced cable.
Depends on the cable and the electrical noise in your environment. In an audio booth next to a light booth, you don't run unbalanced two feet, much less 20. If you do, you'll hum like a harmonica.
P.S. the electrical noise in many computers can be a problem. I had lots of problems with computer-generated electrical noise on the output side of my Delta 1010LT, and that's one of the reasons I sold it. It does
not have adequate electrical isolation from noise on the power rails, and if your computer's power supply has any number of design defects (which are a lot more common than you might think), you, too, can hear weird electrical chirps. There are very good reasons to move the converters the hell out of the computer, and IMHO, anything with converters inside the computer's case is not a professional interface by any stretch of the imagination.
If you're spending the kind of money that an A&H Mixer costs, you should find the extra money to not buy a junk audio card, and IMHO, the 1010LT is junk in every sense of the word. Its drivers are buggy on the Mac and it isn't supported in Vista at all, it is not electrically isolated from noise sources inside your computer, it doesn't record with nearly the quality of modern converters, its built-in preamps are utter crap....
But if you've already made up your minds based on a bunch of reviews, go ahead. When people in here say pretty much the opposite of what those reviews say, though, you might do well to listen.
P.S. Musician's Friend does not publish bad reviews as far as I can tell. I've submitted several, and I haven't seen one yet.