PH stability

Question
Ok, here goes.
I am a new Aquarium Hobbyist, and have a 55g setup with Marineland C220 Canister filter, as well as a Marineland 350 Biowheel.  I used the Fishless cycling process, by adding raw shrimp, and waiting for ammonia to spike and then drop, then nitrites spike and drop. (this took about 4 weeks)  Ammonia & Nitrites are both reading 0 and nitrates are generally < 10.
I keep the tank around 80 degrees.

Here's my stock.
2 4" pearl Guaramies (sp?)
1 3" rainbow shark
2 2" gold barb
6 1" zebra danios
6 1" Otocinclus
3 2" cory cat
2 2" red swag swordtail
4 1" ghost glass cat

The Tank is generally peaceful.  The Shark will chase the Gold Barb's whenever he gets the chance, and the Danios will chase each other constantly.  But no real violence.

PH is my real question.
We have a well, which supplies water to our house.
We have a "whole house" water conditioner/neutralizer

When water comes out of the tap, the PH is 7.0
however, after it sits for 24 hours, the water naturally returns to its "un-neutralized" state, (which is 8.0)
So, my tank PH is 8.0.  However, when I do a water change, I add "tap" water (which is at 7.0)  So If I do a 20% water change, the tank's PH ends up at about 7.6.
24 hours later, the PH is back to 8.0
I understand that this PH "Bounce" is not good for the fish.
I have tried doing a water change with 5gal buckets, which were filled and left to sit for 2 days (so the PH is stable at 8.0), but when I use this water, the temp is not right, because the house isn't 80 degrees. (not to mention, that the 5gal bucket method is a serious inconvenience.)
I know there are products on the market that will "raise or lower" the ph.  
I'm considering using one of these products during my water change, to "stabilize" the PH during the first 24 hours after a water change.
Or do you think I'd be better off just leaving things the way they are?

Any recommendations would be greatly appreciated!

Answer
HiYa!

I wouldn't worry too much about stablising your PH. Check your KH levels (KH acts as a buffer for your PH levels)and if your KH levels are 4 or 5 or above, your fluctuations in PH levels eg your bounce between 7 - 8 won't matter AS much. If your KH levels are lower than 4/5, buy some KH powder and bring your levels up. The fact that your tank and fish are fine and happy says that the fluctuations in your PH aren't affecting your fish.

As for the temperature of the water your putting in your tank, your heater will heat any fresh water you put in your tank, so it doesn't need to be at the same temperature as the water already in your tank and you will probably find that as you put the fresh water in your tank that your fish swim through the stream of it, as most fish enjoy the feeling of it.

Cheers!

Rach