Well, it could stand to be said that like with many equipment related questions, there has to be a disclaimer made about the applications of said bit of kit. Fretting too much over a 23 or a 25 or what have you is kind of like spending too much time trying to decide on a given lens or a camera body - I think the best apporach is to realize that a) there is no clear cut right or wrong and b) especially in this case, the difference is subtle and probably can't be definitively judged one way or another and finally c) you should try one for yourself with a specific result in mind and see how it fits your needs and expectations.
The last thing I would suggest is doing what I did as a beginner - I went out and bought a bunch of filters and started sticking them on my cameras with no particular end in mind hoping to get "something interesting". Having done it, I can tell you that at least in my case, it introduced a whole bunch of variables, and I ended up learning next to nothing, and getting pretty random results, since I didn't know what I was doing to get a particular result, etc. I know that what I did sounds pretty stupid - but, it is easy to get cought up in the excitement of it all and end up with a whole bunch of shots which only leave you with a "well... I got
this, but don't ask me how" wehter the "
this" is a bad thing or a good thing.
I guess what I am trying to say in my own, long winded way
, is that I would recommend asking yourself "what do I want to accomplish", apply that to some research and your budget, and in the end you will have learned more and spent less. Whatever you do, have fun and best of luck,
Peter.