You aren't going to get a fast analysis in any case. Optimal separation in the SEC mode is obtained at flow rates about 8x slower than would be used for a column the same size in a gradient mode. This is necessary to insure that the smallest analytes have time to diffuse to the bottom of the pores, thereby accentuating the difference in column volume available to them vs. a larger analyte. That's why SEC columns tend to be large; you can elute them at flow rates that most HPLC systems can deliver reliably.
The next factor you should be concerned with is the pore volume. The greater the pore volume, the wider the separation of analytes within the fractionation range. Generally, silica-based materials can be made with greater pore volume than can polymeric materials, which require thicker walls between the pores in order to withstand the backpressure of HPLC. The Jordi materials are the most durable in this category, as far as I know. That said, I advise you to compare their pore volume with that of good silica-based materials. There's no point in getting a column that lasts forever if it can't separate your analytes well enough. Tosoh's polar silica-based materials for SEC perform well overall. However, their good separation within the fractionation range comes at the expense of durability; the pore volume seems to have been increased by making the walls between the pores thinner. We've gotten reports of these SEC columns failing after 3-4 weeks of use. An example of a compromise would be our PolyHYDROXYETHYL A columns. The pore volume is certainly smaller than that of the Tosoh silica and so the separation isn't as good within the fractionation range that you're interested in. However, if the results are good enough nonetheless, then you'll have a column that performs well enough for a reasonable period of time.
I might mention that a number of polymers have to be separated in SEC using organic solvents; an example is the use of hexafluoro-2-propanol as the solvent for analysis of nylon. In such cases, there's no substitute for a rugged material like Jordi's. In your case, though, gentle aqueous solvents would work fine. Any intramolecular interactions can be suppressed by including a small amount of a chaotrope in the mobile phase.