The number of options for scanning film has thinned immensely in the last few years. While I'm not necessarily a "fanboy" of the Epson V700 scanner, it does do quite a good job especially considering it's price point. I "upgraded" to the Epson from an Agfa T2500--what a monster, but in it's day, did a good job. The Epson does as well, if not better in all regards. It's glassless frames, while appearing flimsy, do do a good job of hold holding film reasonably flat.
Regarding the "optical" resolution question, I believe the OP was going to use it for 2 1/4 film, other than scanning sharper grain, I don't believe anything above 2400 dpi would gain you much. Quite frankly, even the 2400 dpi of the Epson seems noticeably sharper than the Agfa T2500's 2400 dpi (or ppi if you so chose).
No disputing, that you can get better results from PMT scanner, but not many of them left operating anymore. The maintenance on them was really expensive, even if you could pick one up for sale for 2k.
It's getting to the place that you could use your 36MP Nikon D800 in place of a scanner. Something to consider.