i got a series 2 r33. IMO - it looks bloody nice (specially the back), more power, more space inside, nicer interior etc. And as mentioned - minor mods can make a huge power difference to the stock version. However, the car is big (compared to the r32) - both bulky and its as long as a family sedan.
R32, is old - so there might be more problems than the r33 - but this comes down to how the previous owner used it. If it straight from japan, you probably would never know how the previous owner used it (i.e if ur buying one off a SAU member, u will have an idea as to what the car has been through).
Both are great cars on the road and track....pretty much, either one u go for, u cant lose - unless u buy a lemon.