Got to agree with Jess, you're much better off spending big money on brakes and small money on wheels... I mean, the wheels are great, but $1200 + tyres (which will NOT be cheap) for wheels to put over drums? Plus the cost of spacer drums, wheel studs... And the hassle of big arches and cutting your guards It would be very, very easy to spend well over $2k to get them on, and for not much (if any) more money you could have S discs and alternative 10" rims and tyres. Alternative as in Tasmans/D1's/Firsats/Superlites/Contessas... Yes, I realize you want something different, but most if not all of those options (or others you might find) will be different to what you've already got.
And saying it's a daily driver - that's even more reason to spend the money on discs. You're more likely to need discs in peak hour traffic than on a club cruise.
Beyond that... Yes, there's the extra wear those wheels will bring, the ride will deteriorate, the handling will deteriorate, and the wheels will be heavier. Certainly they'll be heavier than standard 3.5" wide wheels with 145's! And we know you like light weight, as illustrated by your Lancer (no I'm not stalking you, but I stumbed across your Whirlpool thread ages ago).
And I agree with Angusdog and Blue_Deluxe - while the Rims are cool, you'd look like a try-hard ricer with them over drums.
