Seeing as you only have one gamecard and you don't mind putting in the time for the new town, and you're unhappy with this town
i'd say go for it
but only If you won't get sentimental about your old town
because I've reset loads, on ACNL and ACCF and I wish I stuck to my original town because when you've had your original town for ages, it has memories attatched to it of 'the good old days'
and you'll remember and miss it