RB750 is a great little router. What would be great though is if they added an SFP port to it so that one could add a fiber adapter to it. Then the router could be used in a fiber to the premise solution.
Yea, sure, and do not forget to leave the same price 
Are you willing to pay for this feature some extra $300 when you can buy fiber transceiver for $40 ?
Here’s my home installation: RB750 + Procurve 2510 + 10/100 SMF WDM transceiver
If you are looking to reduce the component count for the end user, yes. I have not found any such transceiver at that price, please send me a link to your supplier!
Just the SFP is 140$ not to mention that the converter box is about 100$ to 200$
Right now we’re using Level One FVS-3800 converters with Digitus SFPs. The converter (which is remotely manageable and supports bandwidth limiting, VLAN, Q-in-Q) costs about 76 Euros and the SFP about 22 (excl. tax). There’s also a Gbit version with the GVS-3800 with about the same price tag.
The FVS to us proved to be rock stable. We started deployment in early 2012 and never had a problem with them, other than I’d rather use something rack-mountable with more features per buck - such as an RB2011 if only it’d support 100FX SFPs.