I currently have a standard 33" double sink in a 48" base. It doesn't necessarily look strange, but I don't consider a sink base to be very efficient storage, so in my remodel I went with a 30" sink base, and a smaller sink. That gave me 18" to use for drawers!

Yes this is a semi custom home so they have it laid out there way if it had been me I would of went with a smaller cab for sink base and used the space or something else indeed. I looked at a bit bigger sink and the price at Ferguson is not bad or Kohler. Hubby also saw some new sink from Kohler with a lower divide in middle he thought sounded good I have to look at that not sure about that concept.

32" sink in a 48" base cabinet will look fine. The extra counter space on the sides will be handy for prep work. Is there any reason you are going with a Kohler sink? I know many people prefer big brand sinks, but nowadays even the Kohler and Elkay sinks are made in China. Many people here have been very happy with Kraus and Ruvati sinks. You will be paying almost half the price. Kraus and Ruvati are almost all 16 gauge stainless steel (the thickest steel available for residential kitchen sinks). I myself have a Ruvati sink that I am very happy with, and everyone who visits our kitchen compliment us on it. It has excellent soundproofing and the brushed finish looks very good. It also came with a bunch of extras including a bottom grid that protects the sink from scratches. Overstock.com is a good place to buy your kitchen sink, especially for their return policy.

Here is a link that might be useful: Overstock