To the OP they do look nice!!Its nice having the tires out to the edge of the wheel wells.I've been running 1.5 spacers for a long while.....no problems!!I just re-torque them every time I rotate the tires.I bought (I think their called Spydertraks or something like that. I bought them from Slee)I wouldn't skimp on spacers I have seen some pretty cheap ones out there, I would get some quality ones because if they fail(break) the out come is very bad!!Failure at 70 usually = hosptial or death!!I think I paid about $100 a pair!Also the bigger the spacer the more strain you put on your wheel bearings.So I would think a 3" spacer would cause you to replace wheel bearings alot faster than a 1.5.Hope that helps!
If you are running big tires, you are already putting bigger loads on the bearings. Other than the extra hardware, spacers are the same as changing to wheels with different offset. 
