I'd suggest, stick with 10s hehehehe...nag 9s ako dati and ended up going back to 10s.
Okay talaga ipaset-up ang gitara, if you have old guitars, maganda din mag practice dun. I prefer setting up and intonating my own guitar para alam kong pasok sa panlasa ng daliri ko. hehehehe
Tuners, tama sinabi ni j.nikko3123 Tsaka pag di mo gusto yung tuning ratio nya, nonetheless, upgrades=extra bling, extra bling=extra expenses, extra expenses=needs extra cash...so yeah 
It's nice to have it set up at first by a tech or luthier, to adjust the action, fretwork, eliminate buzz and dead spots, and other aspects of the guitar that involves playability, so that the guitar is at its best condition to suit your playing style. After that, tuning and intonation IMO should be something that a guitarist can do on his own, as they are the easiest, most important, and most recurring adjustments that need to be done before you even play. Then go back to the tech/luthier when it needs a good "overhaul" maybe half a year or even every two years depending on your playing and the condition of your guitar; or when you're switching styles altogether (blues to drop tuned metal, I'd go to a tech for adjustment).
As for tuners, tama, stock tuners are almost always fine. Usually it comes down to needing a different gear ratio and/or a locking tuner. For most people, stock tuners are fine; most can manage really slim tuning ratios and check the tuning every song or two, and for people with floyd trems, they have their locking nuts.
