Congrats on the buy, great car and am sure you will never regret the decision of waiting/buying as I did. Regards to the mod, swift is the only car, which any mods you do, it looks good. As one of the guy who did some mod in my car said, "Sir, its like a dulhan. Any adorations will add value.
Zdi has a decent width compared to the V and L ones. Upgrading might cause minor error in the speedo.
Check the link below Visual Tyre Size Calculator | Kouki Tech
I upgraded my 2009 Vdi to 196/65 R14 on Evo alloys.
When I was scouting for good alloys, a lot of ppl told me to go for R15, which I did not. This was due to doubts like warranty getting void whether it will fit in the space designated for the stepney and also a bit of money crunch at that time because I wanted to put some money on a good ICE for my car.
Know what, right now, I regret the decision I made.
I should have gone for R15. 195 profile tyres looks a bit more muscle. It does defenitely handles the potholes better, but look wise, not that great.
Also in R14, the designs are very less. So, go for it 15. I believe.
Other mods made in my car.
1) JBL Amp+Infinity Speakers+Pioneer HU.
2) Sun Film
3) Art Leather Seats + Steering Grip(it has already worn out :()
4) High Security Number Plate
5) Rear Spoiler
6) Racing stripes running through the middle of the car.
7) Head Lamp Upgrade to 100/70
8) Roots Power Horns
Future modes planned
a) Upgrade to 196/60 R15 with a nice looking alloy
b) Projector Head Lamps
c) Performance Upgrades
d) Black Colour Window frames