Tee-Cee,
don't get hung up on the reel size with regards to weight and balancing rods. The weight differences between 2500, 3000 and 4000 can be neither here nor there in many reel ranges. In many ranges it will matter little which you choose. In others, it may actually be beneficial to use the larger models.
Despite the popular misconception, most rods balance point is well above the reel seat. Even with a reel fitted, that remains the case. Even with the stupidly light 13' Drennan Acolyte Ultra, that's reputed to be brilliantly balanced, this is the case. Without a reel fitted (and the reel seat screwed down), the Acolyte balances 15.5" above the (fixed) back edge of the reel seat. With a 4000 sized Shimano rear drag match reel (admittedly a pretty light model) fitted, the balance point is reduced to 6" above the back edge of the reel seat. With the same model reel in 3000 size, the balance point moves forward another half inch. Putting the notoriously weighty Abu 507 Mk2 Gold Max on it, the balance point moves back to 5" above the back edge of the reel seat. Even with this monster fitted, the balance point is fractionally forward of the cork.
The above is one of the reasons that I have absolutely no use for reels smaller that 3000 size. The weight reductions offer little pratical benefit. A rod can paradoxically feel lighter with a heavier reel fitted. The smaller reels invariably have lower diameter spools, which means tighter coils of line coming off. It's also often the case with Shimano models that the 3000 model has an "S" suffix, indicating shallow match spools. This means that the 2500 models often have a greater line capacity than the bigger 3000S model.
Another negative for the 2500 size reels is that they are often fitted with shorter handles. That alone drives me batty. It's also worth bearing in mind that the body sizes on 2500, 3000 and 4000 sized Shimano reels are often exactly the same, only the rotor and spool change. Sometimes only the depth of the spool changes.
I can tell you that my 11' Drennan Matchpro Ultralight tends to wear a rear drag Shimano 3000S reel. The balance point is just above the cork. Even with a 4000 fitted, the balance point is the width of your finger further back.
I very much doubt that you should be looking at 2500 sized reels, from a balance point of view, for your 12 and 14' Matchpro Ultralights. Even the really cheap models shouldn't be heavy enough to bring the balance so far back as to be a problem.