The thing is with my Shimano Stradic 3000 I get the the frame of a small to medium size spinning reel with the performance upgrades that comes from using a reel with a large spool. To quote Van Halen I get the " best of both worlds", all I can say is I've used both and I won't go back. The great thing about the time we are in with the technological advances made with fishing reels the last few years is that we can get reels with high line capacity without the weight and bulk, a great example is with some of the new low profile baitcaster likes the Curado where the same trend has been applied.
I understand that, Primas. But in the original post, Zelmo was wanting a 2500 but considering a 1000 and people started suggesting up to a 4000. I will admit that I haven't handled all those reels, but I can't imagine a rod that would accept both 1000s and 4000s and be balanced.