Hey Michael, I work for Beaurepaires, well kinda I'm leaving but anyways.
I can suggest the Goodyear Assurance very good long lasting Silica tyre, Very quite, long lasting if you keep them going healthy by regular alignment and pressure checks. There about $120 $130 i think
Next suggestion, Dunlop SP300E Silica tyre, suppost to be on par with the Goodyear but we don't seem to think there quite as good. I no its a completely different car, but they come factory on camrys, and They fetch 65,000km+ when looked after, my grandparents had them on there Vr statesman they loved em i have them sitting in the shed cause my parents brought there car and put 17"s on it, They are normally around the $120 mark,
Cheaper again Id say a Dunlop, Monza 200 There a good tyre there not silica but they seem to be a very good lasting Tyre nice and quite as well.
If you keep the wheel alignment up to date every 10,000km unless you hit a pot hole pretty hard or a gutter, it should be all good, Keep your pressures at between 34/36psi depends on if your worried about a lil bit bumpyer ride, wouldn't make much differents, but the higher the pressure the less resistance and effort involved to move the Tyre around which means better fuel economy, better lasting Tyre keeping them rotated and balanced every 5,000km is a must.
But yeah other than that you should be sweet, When you go in there haggle with them say you got the cash right now you want all 4 do the alignment for free, if they wont say half price and they got a deal.
The thing is a wheel alignment doesn't cost them anything to do cause its only time involved so if they don't charge for one it doesn't really stuff them up other than average for the month, but that's there problem not yours, Just go in there asking for two sizes one for a lil car and one for your commodore so they think your going to come back with the lil car as well
Well goodluck let us know what you end up getting