Help with wheel choice 15" or 17"

Almost forgot I posted this.. lol

Anyway, to answer a couple questions.

The car in currently sbp. I converted it a couple years ago from 9" drums to the SBP KelseyHayes disks.

Why am I set on keeping the sbp, well I already did a brake swap once, and I've already rebuilt the entire front suspension. Dont really want to spend the time and money to convert it to LBP and re-do and re-buy half the stuff I've already done. And I really dont like how the 73 up swap moves the front wheels out by almost an inch per side.
The cost of the swap is also a factor.

Whats the lbp swap cost, probably $700 to $1000 ? If your including new rear axles, drums, brakes, etc.
I could do the swap and then look for cheaper wheels. But I really like these rims.

As far as 15 vs 17, I guess I could go with 16's, I checked their site again and they do have a 16 available with a range of different backspacing.

Its just hard to decide which way to go. Do the swap and have a larger selection of cheaper wheels.
Or stay with the stuff I've already rebuilt, and pay through the nose for nice rims. ?????