Can someone give me some insight.

Getting Cables to audition from the cable co is a great way to get into seeing the diffs from brand to brand, and price to price... the thing is though, to only try out one or two pair at a time max.

AS was said, left alone cables can and do revert to being cold and need days of operation to come around... especially MIT. they should not have given you new cables. I[ve owned a few MIT cables and gotten them mainly from the Cable co... SR too.

it might also pay off for you to read the reviews posted here and by other users elsewhere online to see what interests you now... there are so many brands and levels of cabling, it could take a few lifetimes to check them all out.

Better wires let you hear better, your own gear. Wires do matter, don't think they don't.

good luck

Try something different? If you have a preamp with a tape
loop,preferably remote controlled,try a pair in the loop.
If you hear anything that degrades the music,it would a
pair I would not want in my system.If all the cables do it,
then its the tape loop.Not a proven method,but it seems to
help me out.Anybody interested in better interconnects like
yourself hopefully benefits from my experimental method.

This is the problem with borrowing from Cable Co; not enough time to settle, especially when auditioning a number of variables. They don't tell you that; they surely didn't explain it to me either. I learned to know better both here & from my own experiences. Bob is a nice enough guy, but it hurts their business IMO when they throw too much at you like this.
These guys are right; cables can take a long time to settle, even when used. Much valuable insight imparted above; esp. from blindjim. On my rig, MIT took a good month; Synergistic's best cables took literally *several* months to optimize even when driven 24-7. Initially I thought for some reason they just weren't too good on my rig; now they're amazing.
Some may try to tell you that your components or your ears or whatever something is wrong, if you're experiencing these issues; surprised we haven't heard from those here too. Shaun you've already proven otherwise to yourself, even with lesser priced equipment.
This can be pretty tough to determine; cables come in all flavors & prices; it can be a real challenge to figure out what works best for YOU with YOUR setup. And just because something works well for you doesn't assure similar results on a different rig, & vice-versa. This is why many of us buy used here & experiment at great length, then sell off later what we don't find in our best interest. Or keep them for later experimentation if/when we decide to change the componentry.
I'll share with you another mistake of ignorance that I made when I started the cabling audition process. Be aware that you need to warm up your solid state equipment and LEAVE IT ON (expept when changing cables of course) before comparisons are valid. Cold equipment sounds cold; 24 to 30 hours is typical to reach thermal stabilization. Warmup time can vary by the component & you'll get to know from experience how yours behaves.
A second set of ears can also be useful, as we all hear somewhat differently. Have some fun with it all & best of luck. You'll certainly sharpen your listening skills along the way.

I do not see a mention of speaker wire. I would make sure to use a quality speaker wire (not zip cord) and then see where you are regarding sound.

Also, fwiw, I would be tempted to replace everything with Bluejean wire. They have been mentioned in these pages many times as consitently good wire products.

You can try different cable til you are blue in the face. You will get different results with all and after a few weeks will see the weaknesses in eveyone. You have to settle on something and if you want to save money just a well made wire will suffice.

my 2 cents...

Larryi hit the nail on the head. Although I agree somewhat with the other posters about burn-in and settling in - I believe you should be hearing most of what a cable will make your system sound like right away. Sure, your will hear subtle changes as it settles in and perhaps significant changes if you have a trained ear. It also depends on your definition of significant. But in general, there will be no monumental swing that all the sudden you go "wow there it is!" At least that has been my experience with a variety of IC's and speaker cables. YMMV