does it really make much difference what cables I have connecting my pedals together in terms of their quality?
If by quality you mean sound quality or tone, no. Absolutely no difference.

Cables are cables and they just transmit electricity, not sound. Most cables for audio, whether the big brands or the small brands are all pretty much small gauges and offer little to no resistance as well, *especially* at the short distances you are using to connect between effects pedals.
Think about it this way - the "wire" or circuits on the boards inside your pedals are waaaaaayyyy smaller than the wire in your patch cables. Same for the insides of your preamp and power amp too
If by quality you mean quality of construction - yes. Absolutely yes. All the various brands vary quite a bit in construction quality and long term durability. Spend what you can afford and try to buy good molded cables that are less prone to breakage on the ends. Some cables, like Monster, have free lifetime warranties too so that if you break them you get a free replacement.
Also, im going from a tuner to overdrive to chorus to a limiter enhancer...theyre all in series and running through the fx loop on my amp...
anyone see any problems with this?
YES! There is a problem with that. Most pedals are not built to handle the signal level from an effects output.
Also, speaking to your concerns of tone suckage - you still get tone suckage (probably worse) out of your effects loop... consider that your effects loop is a little 'break' in the wire from your preamp to your poweramp.
Plug 'em into the FRONT of your preamp for better signal quality and less tone suck.
My 2 cents.
