You know, I used to brew in a glass carboy, but that was before I found out about 'primaries' and 'secondaries'. Then I got a brewing bucket and used that as a primary. Works great. Now I doubt I'd ever use the glass carboy again, unless it was for wine or mead or something VERY heavy.
The plastic bucket works great, and is much easier to deal with when transferring. Plus, I dont' worry about scratches, because it's so easy to get your arm in there and wash with a sponge.