Keep in mind that if you go up a tooth on the front sprocket, 1st gear will go higher as well. You mentioned you wanted a lower low gear. It took me a while to get used to running the bike at higher rpms. The bike loves running at 4500 rpm. You might better ride it for awhile before changing sprockets to get a better feel for what you want.
It's possible you are not running up the revs enough in first gear making you feel it needs to be lower. If this proves to be the case, going up a tooth may be the ticket.
