I have an OiOi bag and it is fantastic. i've been using it for 3 years now and it's still going strong. it is not a leather one, just one of the fabric ones i think it was about $150 from memory? but seeing as i have used it non stop everyday for 3 years and it has seen me through 2 kids i think it was money well spent.
i think you should definitely buy the one that you want. if you have the money, then go for it hun.
sending lots of baby dust your way