Bicycle repair and technical discussion

Question about bike tire sizes:

I have a 1980s vintage raleigh usa road bike for a number of years that I've turned into a commuter bike, and I'm considering replacing the tires on it soon since they're getting cracked and worn out. It currently uses 27 x 1.25 size tires and I'm trying to figure out if I should get the same size tires, look for something that's a little more standard, etc. Also would happily take any brand recs you have. I'm currently using 700 x 35c inner tubes which seem to be working fine, but because this is an older bike I'm not as used to having to make all these sorts of mental conversions. Any help would be appreciated.

#bikewrench