WhiteSalmon said..
I find the gap between a 3.0 and 2.5 to be large enough that I wouldn't want a full 3.5 to 2.5 jump. I'd have a lot of awkward days where I'm either overpowered on a 3.5 or struggling to pump onto foil with the 2.5. My 3.0 is a Mantis and the 2.5 is a F-One Strike though, so that may account for some of it. For me, a three wing quiver of 4.0, 3.0, and 2.5 is perfect. If I had unlimited funds I'd get a 3.5 and a 5, but rarely miss it.
The caveat is that wings even of the same brand and model can be different across different model years (not to mention the effect of wear if secondhand). For example, an older Mantis 3.0 that I tried (it was very high aspect model) was really gutless.
