Seneca,
My preference is in increasing the number of bazaars in a housing block not increasing the number of "Getting" SYs with a SY per block.
I've never figure this out mathematically but I think there are a lot more pluses than minuses.
I'll usually have one SY per good close to the source (industry or dock) in a "Accepting" mode. This is what I would call my central hub. From the central hub I will have an outer ring and on that ring I will place a SY in a "Getting" mode, to provide goods for two or even three housing blocks. My "Getting" SYs will usually be limited into getting not more than one or two goods.
Concerning the distance from the housing block to the "Getting" SY. I place two or three bazaars per block and let the 2 ladies at each bazaar gather the needed goods to be distributed.
Here are the pluses I see:
Because you have fewer SYs with this approach you will have more goods at each SY over the same amount of goods. Thus you very rarely find yourself in the situation of a bazaar lady going to a SY and not finding or not having enough goods needed.
The bazaar ladies are very proficient in determineing what is needed. Thus you have less concern about making sure the right number of goods are sent to each SY per housing block.
Because you have more bazaars per block your housing will evolve at a quicker rate quicker and devolve at a slower rate since the bazaars have the surplus not the SYs.
With fewer SYs you have less of a problem managing the goods. (Have you ever mistakingly changed the "Getting" SY good to "Accepting" and end up with the other SYs depleting the goods)As JWorth indicates the 35 squares really cover a wide distance and have never had a problems in city layouts exceeding that limit.
Just my thoughts, would be interested in what other have experienced or prefer.
Good gaming
Vriesea