I should clarify why I feel this is an important question. Might help with the advice, might not.

If it's a H2H league:

Even though the categories appear to favour goalies (5 x 4), in a H2H league goalies are generally less crucial to success given that it all comes down to a given week. That being said, I understand that you need strong goaltending to put yourself in a position to be successful.

Another point is the categories themselves. Even though there are four goalie categories, shutouts don't usually have an effect on a matchup and usually ends up as a tie, so it's pretty insignificant. That leaves three categories, which devalues goaltending a bit more, but given that two of them are ratios you need goalies that will help you more with quality over quantity. This might favour Fleury and Schneider more than Kiprusoff, as even though he had a great season, his value can fluctuate from year to year. Fleury hasn't been elite but is solid, plus he's on a better team, has a solid backup pushing him (Vokoun) and is younger.

If it's a roto league:

Goaltending is crucial in this format. It's all about cumulative production and you need high end goaltending to give yourself a chance at a title. Furthermore, shutouts, although infrequent, are extremely important since each one will have a significant effect on the standings. So I would go for goalies that could steal a few games or are on better teams. This would make me choose Fleury and Schneider even more. But Kipper could be useful as well depending on max games and if Schneider splits starts again. In this case I would consider keeping all three goalies.

Other comments:

Knowing this, there's an option that you could actually drop both Seguin and Neal and keep all three goalies, especially if you feel many teams will keep two+ goalies, which wouldn't leave you much in the draft. If that's the case, there will be plenty of solid offensive players available. It's a tough call. One thing for sure, I would definitely keep two goalies. Also mentioned by Brosive, the wing eligibility is a factor as well. If Seguin is C only, I would consider keeping Neal if you are debating between the two since you have two centres already. Giroux (I'm guessing) should have C only (soon, if not currently).

In a keep five league, it's likely that there will be a lot of turnover from year to year and other than a couple of core players, it's possible that you may be focusing your strategy more on a yearly basis. What was key to your win last season other than depth?