Using the 114.3 is probably just fine for any standard road use and will not result in damage or vibration but ONLY IF you use eccentric lugs and properly sized, quality centering rings. If you do not use the eccentric lugs then the misalignment between the studs and holes will strain both the studs and the rims and will increase the chance of failure.
This is why it will strain the rims:
90% of the clamping load from the lugs will be placed on the outer edge of the bolt holes. This will become a point load and deform the wheel if you are lucky and crack it if you are unlucky. (this would be the point where things start coming apart)
This is why it will strain the studs:
The misalignment will cause the studs to be pulled inward. This will exert a fractional shear load on the lugs. They are not meant to have any shear load applied, only tension. This will reduce their life, and if localized stresses are imparted will promote corrosion. (also where things will start coming apart)
This is why using eccentric lugs along with centering rings makes this fitment acceptable:
Modern hubs are dimensioned and machined radially from the center as datum. This means that the center ring is the most important dimension to fit. If the rim fits properly on center, then the lugs will all be equidistantly (improperly) spaced. Now when you tighten the 2-piece eccentric lugs they will offset to seat properly in the wheel while keeping the studs straight.
This is why eccentric lugs are OK when used with centering rings:
The studs are not preventing your wheels from rotating in any way. All the studs do is provide something to use to exert a clamping force. It's the friction interface between the rim and hub face that keeps everything where it needs to be. Some cars (Saab 9-3 for instance) even used eccentric lugs from the factory for some applications. Once you apply the clamping force, the wheel isn't going to move baring levels of force that tend to damage the rest of the car or wheel anyway. Therefore, using eccentric lugs is analogous to having slotted holes in a bracket. Slotted holes are fine unless all the holes are slotted. If all the holes are slotted then you have a hard time lining everything up (hence the vibration that people are getting with wheels). Without centering rings all the holes are effectively slotted when using eccentric lugs. With centering rings one is not and you are OK. Ensure the eccentric lugs have sufficient compliance to seat fully in the rim without contacting the studs or you are not actually solving the stud tension vs. shear problem and do drop the coin required to procure quality lugs. They are holding the wheels on your car, after all, and you've already made a comprise to fit the wring size wheels.
Hope this helps, but to summarize:
1.) Ideal, and factory solution is 5x115 wheels with proper hub centers OR centering rings
2.) Acceptable solution is to use 5x114.3 with hub centering rings AND eccentric lugs (and be honest with yourself by admitting this is acceptable but not ideal)
3.) DO NOT mount 5x114.3 without eccentric lugs AND hub centering rings (because you may die)
4.) DO NOT mount anything without hub centering rings (or they will vibrate)