At the current moment in time we're a more attractive option than St Mirren I'd agree but I wouldn't go so far as to say choosing them over us is insanity, particularly if you are going to get a similar or slightly better deal.
It has already been rightly stated the competition there is in our midfield. Remember it was about three or four months before O'Hara got anywhere near our starting eleven (admittedly he was injured for a spell).
McGinn via Hibs is now one of the hottest properties in midfield the country. Lewis Morgan won a move to Celtic. Stevie Mallan moved from St Mirren to an English Championship side so there's a pathway to progression there too.
Kilmarnock and ourselves even following the second place finishes illustrate how quickly the provincial teams can go up or down the table.
Whilst ofcourse they cannot offer European football I don't think the gap is anywhere near big enough to suggest it would be insanity to go there.