I agree. That's the main reason I went for the 32-bit version. Currently running Windows 7 Ultimate 32-Bit.
The thing is, 64 bit has become more mainstream since the arrival of Vista, so many more software/hardware developers are catering to it than before. Furthermore, as the OP is getting a new machine, it would be fully compatible with 64 bit and very unlikely to present compatibility issues.
The only issue I had with 64 bit is my Genuis webcam has no x64 drivers, but that's no biggie... for under $20 I got another that does, A Logitech, I think. As for software, I haven't found a piece yet that won't install on Win 7... all my regular proggies, and then some, installed like a dream.... and if there were any that were a bit iffy, the 'Administrator' and various compatibilty modes will most often fix those issues.
For mine, it has to be 64 bit... to better utilise the hardware and access greater amounts of RAM. With a decent CPU and 8gb of RAM, system lag while multi-tasking is a thing of the past.